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Dummy entries in Add/Remove Programs list
Sometimes, even after program are uninstalled, or due to the files being deleted instead of a uninstalled, the entry in the Add/Remove Programs list does not get deleted. To remove it form the list: 1. Start the Registry Editor. 2. Open HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Windows /Current Version/Uninstall. 3. Delete the program entry here. You can also use TweakUI to do this.

Restart only Windows
When restarting Windows, you don't always need to go to thought the BIOS initialization and POST. Instead of simple clicking on Restart form the Shut Down Windows dialog box, help down the Shift key as you click on OK. This will restart only Windows. This is particularly useful when you change some registry entries or a few system settings.

Improve Removable Disk Drive Performance
Windows gives you the option to use write-behind caching to improve the performance of removable disk drivers.

Open control Panel > System > Performance and click on File System.
Check the Enable write-behind caching on all removable disk drives check box under the removable Disk tab and click OK

Note: If this result in a problem with disk operations, uncheck the Enable write-behind caching on all removable disk drives check box