What are your favorite windows registry tweaks/hacks? Please share…

Most of us have opened up regedit (or similar registry tool) at least once and made some modification or change to fix or tweak a particular windows setting. What is your favorite windows registry tweak/hack?

I’ll start off by listing a few registry tweaks I’ve tested & used in the past with success.

It goes without saying (but I’ll say it anyways) that changes to the windows registry must be done with extreme caution. Careless changes can make Windows operate strangely (even more than how it normally operates!) or cause it to stop working altogether. Back up your windows registry before you do anything:
Click Start, Run, type regedit, and press to open the windows registry editor. Then choose My Computer in the folder pane on the left, click File, Export, give the file a name, and select a location to store it (preferably on a CD-RW or other type of removable media). The resulting file may be huge, and restoring your registry from it may take a while. WinXP’s system restore utility also makes regular system restore points but having an additional registry backup doesn’t hurt.

That being said, I look forward to the various windows registry tweaks/hacks that everyone else has used with great success. Please make sure to provide the full reg key and brief description of the change it makes/advantage it provides to windows.