Here are a couple of performance tweaks for users who have more than 512Mb RAM.
Launch Folder Windows in a separate Process:
Open My Computer -> Tools -> Folder Options
Check the box "Launch folder windows in a separate process"
Force Windows Core to Memory:
Open Start -> Run and type "Regedit"
Navigate to "HKEY_LOCAL_MACHINE\ SYSTEM\ CurrentControlSet\ Control\ Session
Manager\ Memory Management"
Modify "DisablePagingExecutive" to "1"