Our Growing Collection of High-Quality, Super-Small and
Super-Fast, Freely Downloadable Programs & Resources

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GRC Project Chronology: A complete listing of my past, present, and probable future projects — presented in the order of their occurrence — may be found in the Projects section of "Steve's page".

Daily Average Count of files downloaded from this page:  5,120
Total Historical Count of files downloaded from this page:  45,161,636

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Advanced DNS Benchmark utility.

Compare the performance and reliablity of your system's currently configured DNS servers to many publicly available alternatives.

Last Updated:
Size: 147k
Apr 21, 2019 at 13:41
(730.43 days ago)
Downloads/day: 2,851
Total downloads: 6,600,233
Current Rank: 1
Historical Rank: 2

Inspect Windows hardware and software for Meltdown and Spectre vulnerabilities

The Meltdown and Spectre vulnerbilities which swept the PC industry in early 2018 require both hardware and software updates. The combinations and permutations of CPU's motherboards, BIOS, firmware and Windows versions can be very difficult to untangle and understand. GRC's InSpectre utility makes it all very clear.

Last Updated:
Size: 126k
Apr 21, 2019 at 13:59
(730.42 days ago)
Downloads/day: 1,123
Total downloads: 2,206,245
Current Rank: 2
Historical Rank: 8

Display processor's security features.

Quickly determine, display, and explore the availability and consequences of the state-of-the-art security-related features available in the system's processor.

Last Updated:
Size: 115k
Jan 14, 2007 at 12:14
(5,210.49 days ago)
Downloads/day: 602
Total downloads: 5,885,798
Current Rank: 3
Historical Rank: 3

Personal firewall leakage tester

When LeakTest was released, most personal firewalls were easily fooled. Any malicious program could give itself the same name as a trusted program to gain access to the Internet. LeakTest demonstrates and tests for this simple application "masquerading" vulnerability.

Last Updated:
Size: 25k
Mar 13, 2008 at 12:44
(4,786.47 days ago)
Downloads/day: 116
Total downloads: 8,205,903
Current Rank: 4
Historical Rank: 1

Easily disabe (or re-enable) automatic Windows 10 upgrading

Many people are happy with their current version of Windows and would rather than have Microsoft downloading and installing a three gigabyte upgrade to Windows 10. This simple utility uses Microsoft-approved and provided registry and group policy setting to tell 'Get Windows 10' (GWX) not to. It can be run at any time to re-verify or change those settings.

Last Updated:
Size: 85k
Apr 21, 2019 at 13:41
(730.43 days ago)
Downloads/day: 90
Total downloads: 3,146,369
Current Rank: 5
Historical Rank: 5

Give your keyboard a bit of sound

A simple little utility to add a user-specifiable 'click' sound to any Windows keyboard.

Last Updated:
Size: 42k
Oct 29, 2005 at 11:32
(5,652.52 days ago)
Downloads/day: 48
Total downloads: 340,922
Current Rank: 6
Historical Rank: 16

UnPlug n' Pray
Universal Plug & Play management

At the end of 2001, Microsoft revealed a critical defect in Windows XP and ME: Windows' Universal Plug and Play service (UPnP) would allow a malicious hacker to remotely take over any system that was running and exposing the UPnP service to the Internet. This UnPlug n' Pray utility lets anyone check for the presence of the dangerous UPnP service in their system, then easily and safely enable and disable it as needed.

Last Updated:
Size: 22k
Dec 28, 2001 at 15:47
(7,053.34 days ago)
Downloads/day: 40
Total downloads: 4,460,739
Current Rank: 7
Historical Rank: 4

Steve's multipurpose Windows gizmo

Wizmo is a multipurpose miscellaneous Windows utility that provides an array of single-click functions that are missing from Windows. Triggered by a single mouse click, it can do things like power down your system's displays, activate your screen saver, change or mute the audio volume, restart, reboot, or shutdown your system, and much more. It even includes a rather cool built-in "Graviton" screen saver that simulates the motion of any number of mutually gravitationally attracted celestial objects. Check out Wizmo's web page for the current (and growing) complete list of Wizmo's capabilities and features.

Last Updated:
Size: 38k
Jun 25, 2008 at 13:25
(4,682.44 days ago)
Downloads/day: 39
Total downloads: 1,271,805
Current Rank: 8
Historical Rank: 10

ID Serve
Internet server identification utility

Can your favorite web sites be trusted with your personal and confidential financial and other data? With eCommerce activity growing, malicious hackers are becoming more interested in breaking into Internet servers. But many servers are not secure. This utility helps you to easily determine which Internet servers web sites are using.

Last Updated:
Size: 26k
Aug 26, 2003 at 21:56
(6,447.09 days ago)
Downloads/day: 32
Total downloads: 1,050,312
Current Rank: 9
Historical Rank: 12

Tame Windows insecure DCOM facility

Ever since Windows 98, a powerful, but unnecessary and rarely used facility known as DCOM (Distributed Component Object Model) has been an integral part of Windows. The DCOMbobulator checks the effectiveness of Microsoft's security patches and allows the user to increase the security of their system by simply turning DCOM off.

Last Updated:
Size: 29k
May 24, 2004 at 14:17
(6,175.41 days ago)
Downloads/day: 22
Total downloads: 1,941,385
Current Rank: 10
Historical Rank: 9

A fast, foolproof, reliable and easy-to-use USB drive FAT formatting utility.

InitDisk's technology was developed as part of the future SpinRite system. It is able to (re)format any USB drive and optionally make it bootable with the FreeDOS operating system. It has proven itself able to bring USB drives that were previously thought to be dead back to life (much like SpinRite). It is a command line utility, but it can be run by double-clicking its icon in Windows.

Last Updated:
Size: 161k
Dec 19, 2020 at 20:40
(122.14 days ago)
Downloads/day: 21
Total downloads: 14,205
Current Rank: 11
Historical Rank: 31

Shoot The Messenger
Simple Messenger Service Disable/Enable

Windows NT, 2000, and XP hide an hidden Internet server that is running by default. It receives and accepts, among other things, unsolicited network messages that cause pop-up dialog boxes to appear on the desktop. Internet Spammers have discovered this and are spraying pop-up Spam across the Internet. The Windows Messenger server should never have been running by default, and Microsoft has finally fixed that in Windows 2003, but users of previous Windows need to take responsibility for this themselves.

Last Updated:
Size: 22k
Apr 26, 2003 at 07:52
(6,569.67 days ago)
Downloads/day: 16
Total downloads: 2,438,806
Current Rank: 12
Historical Rank: 7

SQRL sign-in app for Windows.

A fully working, super secure system for eliminating all usernames, eMail, passwords, authenticators for website account sign-in.

Last Updated:
Size: 278k
Jun 08, 2019 at 14:55
(682.38 days ago)
Downloads/day: 16
Total downloads: 17,932
Current Rank: 13
Historical Rank: 30

ReadSpeed for Windows.

GRC's Hyper-Accurate Mass Storage Benchmark for DOS. This is a Windows utility that will wipe, reformat and setup any USB thumb drive so that it will boot DOS and run the ReadSpeed benchmark.

Last Updated:
Size: 383k
Dec 24, 2020 at 20:01
(117.17 days ago)
Downloads/day: 13
Total downloads: 4,895
Current Rank: 14
Historical Rank: 32

SpinRite 5.0 Owner's Guide
SpinRite's operation manual

This is SpinRite's owners guide which all SpinRite owners should download and print. However, this manual is oriented toward getting the job done, which is fine once you own SpinRite. SpinRite's "What it Does" Technical Note is a much better guide to understanding SpinRite's functions, operation, and benefits.

Last Updated:
Size: 169k
Jan 01, 2021 at 09:10
(109.62 days ago)
Downloads/day: 10
Total downloads: 431,085
Current Rank: 15
Historical Rank: 14

Check your system for MICE!

Quickly check your Windows systems for the presence of potentially dangerous MICE: Metafile Image Code Execution.

Last Updated:
Size: 29k
Jan 19, 2006 at 03:39
(5,570.85 days ago)
Downloads/day: 9
Total downloads: 311,948
Current Rank: 16
Historical Rank: 17

OptOut   (retired & obsolete)
The original spyware removal tool

My discovery that "Aureate/Radiate" advertising spyware had been installed in tens of millions of PCs without their owners' knowledge or permission led me to create OptOut, the first spyware removal tool. When the Lavasoft folks created the much more comprehensive Ad-Aware freeware, I turned spyware policing over to them. This file remains on our site only because so many off-site web links still point to it.

Last Updated:
Size: 9k
Mar 03, 2001 at 00:00
(7,354.00 days ago)
Downloads/day: 9
Total downloads: 3,055,230
Current Rank: 17
Historical Rank: 6

Free & Clear Font Demo
Sub-pixel font rendering demo

A sub-pixel font rendering demonstration illustrating the technology of splitting LCD pixels for the purpose of enhancing font readability. The details are described on our Free & Clear web site pages.

Last Updated:
Size: 23k
Apr 03, 2000 at 13:48
(7,687.43 days ago)
Downloads/day: 6
Total downloads: 178,503
Current Rank: 18
Historical Rank: 23

Gravity Setup
Gravity Newsgroups Client.

Gravity is THE BEST newsgroups (NNTP USENET) client for Windows. STEVE DID NOT WRITE IT. But it stopped working and it had been abandoned. So Steve obtained the open source, fixed it, added a few features, rebuilt and signed the executable... and he'll be maintaining it from now on.

Last Updated:
Size: 3,628k
Jun 24, 2020 at 13:23
(300.44 days ago)
Downloads/day: 6
Total downloads: 3,014
Current Rank: 19
Historical Rank: 33

Quick and simple NetBIOS enabler

When the ShieldsUP! system was first created, I had not discovered how to safely "rebind" network transports as a means for closing the NetBIOS TCP/IP vulnerabilities. So I wrote the LetShare & NoShare utilities to do this quickly and easily (although in a non-standard fashion). Today, the manual rebinding described on the ShieldsUP! pages is the preferred method. LetShare & NoShare still work and can be useful for allowing quick NetBIOS on/off testing.

Last Updated:
Size: 6k
Jan 19, 2002 at 22:55
(7,031.05 days ago)
Downloads/day: 5
Total downloads: 140,643
Current Rank: 20
Historical Rank: 24

SpinRite 5.0 Literature
Description of SpinRite features

In the old days before the Internet, product literature was often printed and mailed through the postal system. Although our SpinRite web pages provide similar information, this printable SpinRite literature PDF file provides a nice four-page summary of SpinRite's operation and features.

Last Updated:
Size: 66k
Jan 01, 2021 at 09:10
(109.62 days ago)
Downloads/day: 5
Total downloads: 242,050
Current Rank: 21
Historical Rank: 19

SpinRite 5.0: What it Does
How SpinRite performs its magic

This "What SpinRite does" technical note describes SpinRite's many unique technologies and explains why SpinRite is every bit as useful and necessary today (though for very different reasons) as it was when I first wrote it.

Last Updated:
Size: 191k
Mar 29, 1998 at 23:07
(8,423.04 days ago)
Downloads/day: 5
Total downloads: 456,643
Current Rank: 22
Historical Rank: 13

IDentify ASPI Devices
Simple ASPI device display utility

ID checks the visibility of peripheral devices to aid in the diagnosis of ASPI driver problems. Devices shown by ID are visible to the ASPI driver layer and, if they are Iomega drives, can be tested by TIP (Trouble In Paradise).

Last Updated:
Size: 14k
Aug 18, 1998 at 22:07
(8,281.08 days ago)
Downloads/day: 4
Total downloads: 219,354
Current Rank: 23
Historical Rank: 20

Quick and simple NetBIOS disabler

When the ShieldsUP! system was first created, I had not discovered how to safely "rebind" network transports as a means for closing the NetBIOS TCP/IP vulnerabilities. So I wrote the LetShare & NoShare utilities to do this quickly and easily (although in a non-standard fashion). Today, the manual rebinding described on the ShieldsUP! pages is the preferred method. LetShare & NoShare still work and can be useful for allowing quick NetBIOS on/off testing.

Last Updated:
Size: 6k
Jan 19, 2002 at 22:54
(7,031.05 days ago)
Downloads/day: 4
Total downloads: 205,599
Current Rank: 24
Historical Rank: 21



Last Updated:
Size: 19k
Dec 26, 2020 at 12:59
(115.46 days ago)
Downloads/day: 4
Total downloads: 452
Current Rank: 25
Historical Rank: 34



Last Updated:
Size: 345k
Dec 26, 2020 at 12:56
(115.46 days ago)
Downloads/day: 4
Total downloads: 450
Current Rank: 26
Historical Rank: 35

SpinRite 5.0 Addendum
Updates to SpinRite's owner's guide

Important operational notes and feature enhancements for owners of SpinRite 5.0 covering improvements and features added since SpinRite 3.1.

Last Updated:
Size: 65k
Jan 01, 2021 at 09:10
(109.62 days ago)
Downloads/day: 3
Total downloads: 182,217
Current Rank: 27
Historical Rank: 22

Check your system for MICE!

A command-line version of MouseTrap, to quickly check your Windows systems for the presence of potentially dangerous MICE: Metafile Image Code Execution.

Last Updated:
Size: 15k
Jan 19, 2006 at 03:41
(5,570.85 days ago)
Downloads/day: 3
Total downloads: 51,822
Current Rank: 28
Historical Rank: 28

Small Is Beautiful (SIB)
Windows assembly language starter kit

I write all of my Windows and other utilities in 100% pure assembly language. This results in the smallest, fastest, and most efficient programs possible. I created the "Small is Beautiful" kit to help interested assembly language programmers get started writing Windows programs in pure assembly language.

Last Updated:
Size: 20k
Nov 17, 1996 at 21:11
(8,920.12 days ago)
Downloads/day: 3
Total downloads: 255,629
Current Rank: 29
Historical Rank: 18

ASPI_ME Media Demo
Demo of on-the-fly audio synthesis

A small executable demonstration that synthesizes a complex polyphonic sound, using a software FM synthesizer, while unscrambling a sliding tile puzzle. After the puzzle is solved, the resulting wave file is played.

Last Updated:
Size: 14k
Aug 11, 1999 at 00:01
(7,924.00 days ago)
Downloads/day: 2
Total downloads: 116,110
Current Rank: 30
Historical Rank: 26

FIX-CIH Virus Recovery
Total recovery from CIH virus damage

Every April, the CIH virus resurfaces and wipes out thousands of hard disk drives by deliberately zeroing their partition, boot, and FAT tables. The first time this happened I wrote this complete post-CIH hard drive recovery utility.

Last Updated:
Size: 21k
Jan 24, 2002 at 11:29
(7,026.52 days ago)
Downloads/day: 2
Total downloads: 341,653
Current Rank: 31
Historical Rank: 15

Click of Death Audio #1
David Hellier introduces himself

During a live telephone conversation with Leo Laporte on TechTV's Screensavers program, Iomega spokesman David Hellier introduces himself.

Last Updated:
Size: 77k
Jun 28, 1998 at 12:12
(8,332.49 days ago)
Downloads/day: 2
Total downloads: 119,843
Current Rank: 32
Historical Rank: 25

Perfect Paper Passwords
GRC's Open, Secure, Remote Authentication System

This ZIP file contains the PPP.DLL and PPP.EXE which fully implement the CryptoSystem for GRC's Perfect Paper Passwords, one-time password (OTP) remote Internet service authentication system. These files may be freely used to implement identical or similar authentication systems and they are provided for that purpose.

Last Updated:
Size: 24k
Feb 10, 2008 at 16:16
(4,818.32 days ago)
Downloads/day: 2
Total downloads: 26,347
Current Rank: 33
Historical Rank: 29

Crucial Windows XP Vulnerability Fixer

Windows XP has always contained an extremely serious vulnerability which allows any malicious hacker to cause the files contained in any directory to be deleted. This vulnerability can be cured by installing XP's large (50 to 140 MB) Service Pack 1 — which is preferable whenever possible. But this free and lightweight XPdite utility fixes the problem quickly and easily for systems not yet running Service Pack 1. A silent running option also makes it ideal for corporate deployment.

Last Updated:
Size: 30k
Sep 17, 2002 at 10:22
(6,790.57 days ago)
Downloads/day: 2
Total downloads: 1,141,170
Current Rank: 34
Historical Rank: 11

Click of Death Audio #2
David Hellier's free replacement promise

During a live telephone conversation with Leo Laporte on TechTV's Screensavers program, Iomega spokesman David Hellier promises to replace ANY defective IOmega ZIP or JAZ drives whether or not they are still in warranty.

Last Updated:
Size: 69k
Jun 28, 1998 at 12:07
(8,332.50 days ago)
Downloads/day: 1
Total downloads: 96,323
Current Rank: 35
Historical Rank: 27



Last Updated:
Size: <pending>k
(<pending> days ago)
Downloads/day: 0
Total downloads: 1
Current Rank: 36
Historical Rank: 36



Last Updated:
Size: <pending>k
(<pending> days ago)
Downloads/day: 0
Total downloads: 1
Current Rank: 37
Historical Rank: 37

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of this page are Copyright (c) 2020 Gibson Research Corporation. SpinRite, ShieldsUP,
NanoProbe, and any other indicated trademarks are registered trademarks of Gibson
Research Corporation, Laguna Hills, CA, USA. GRC's web and customer privacy policy.
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Last Edit: Apr 21, 2021 at 00:02 (0.76 days ago)Viewed 277 times per day