oh god, so many i could probably write a book.

but ill just post my fav.
automatically close programs that stop responding:
open regedit and navigate to HKEY_CURRENT_USER\Control Panel\Desktop. in the right hand pane, change the value of AutoEndTasks from 0 to 1. there is also another value with the same name in HKEY_USERS\.DEFAULT\Control Panel\Desktop that forces them to close at shutdown. change that from 0 to 1 also.
stop error-reporting after a program crash:
navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\PCHealth\Err orReporting. in the right hand pane, change the value of DoReport from 1 to 0.
terminate the shared documents folder: (this deletes the shared documents folder from view from my computer)
navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Curr entVersion\Explorer\MyComputer\NameSpace\DelegateF olders. delete the key (so helpfully named) {59031a47-3f72-44a7-89c5-5595fe6b30ee}.