Unassociate File Extention Type

See also:
An Utility to Unassociate File Types in Windows 7 and Vista
How to Unassociate, Remove or Delete Programs From “Open With” or “Recommended Programs” List

Create an XP Mode for Windows 7 Home Versions & Vista

(from Lifehacker.com)

Portable Ubuntu Runs Ubuntu Inside Windows

How to use the Sysprep tool to automate successful deployment of Windows XP

See also:
SysPrep Guide @ Vernalex.com

Device Doctor is a Free Driver Update Scanner with Promise

Allmyapps Bulk-Installs Your Favorite Apps to Make System Rebuilding Less Painful

Five Best Windows Task Manager Alternatives

Five Best Disk Defragmenters

(from BBSpot.com)

Little Registry Cleaner

(from LifeHacker.com)

Windows Vista with a Live Thumbnail Sidebar

Five Free & Phenomenal Vista Utilities

• Launchy: a simple and easy to use start-up/launching application;
  
• TweakVI Basic: an automated window resizer;
  
• Sizer: allows you to tweak settings both available and hidden throughout Windows Vista's GUI;
  
• Vispa: similar to Sizer, but with much more options and versatility;
  
• AllSnap: an applet that provides a big convenience in how your desktop windows sit next to each other and the edges of the screen.
  

Windows anti-malware tips

"Do a thorough check for malware, following all of the steps at one of these
Web pages.
Help with malware:
All MS-MVP Sites.
http://aumha.org/a/parasite.htm
http://aumha.org/a/quickfix.htm
http://www.elephantboycomputers.com/page2.html#Removing_Malware
http://mvps.org/winhelp2002/unwanted.htm
http://inetexplorer.mvps.org/darnit.html
http://www.mvps.org/sramesh2k/Malware_Defence.htm"

Anti-malware software:
Spybot: http://www.safer-networking.org/microsoft.en.html (Win 98 ok)
CA Anti-Spyware: http://www.ca.com/us/products/product.aspx?id=5222 (not free)

Fix Disappearing System Tray Icons in Vista

PreviewConfig Adds File Types to Vista's Preview Pane

Turn Off Vista's Auto-Tuning to Prevent Browser Slow-Down

Supercharge Windows Vista's Startup Time

What happens during Vista's startup and how to improve boot times.

Run Windows andLinux without virtualization

Linux running *on* Windows.

Get Rid of the Junk Left Over after You Install Vista SP1

What is svchost.exe And Why Is It Running?

(from BBSpot.com)

Hedgewars

Free worms-like turn based strategy game.