This is an old one, but it’s one of those things you lookup every time you setup a new machine cause there’s no way you remember exactly what registry keys that where again.
This list of registry tweaks for Windows NT/2K/XP is a nice compilation of what are probably the most useful ones to be found.
My personal favorites are speeding up the taskbar by adding the
HKCU\Control Panel\Desktop and setting it to something like 133 (default is 400) to speed things up, but without making it too fast (like by setting to zero) so that your menus don’t go apeshit on you as soon as your mouse cursor moves over them.
Enabling tab for filename completion is another one of those things you end up getting so used to you can’t imagine living without it (if you’re any bit of a command line lover that is). So just add the
HKCU\Software\Microsoft\Command Processor\CompletionChar and set it’s hex value to
0x09 (which is the character code for the tab key). So from then on you only have to type a few characters, and after hitting tab the OS will find out what you where looking for… it’s great when you can make that thing do stuff for you innit?
Plenty more goodness to be found to increase security and performance so you’ll probably find something you like in there, so take a peek if you like.