Yes, you read it right. Windows XP tracks each and every action you take, each and every move you make. It tracks program run by user, the paths followed, the documents used and M$ knows what else. Disable this “feature” will free up system resources and other side effects you may yourself think of.
KEY : HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
Value Name : NoInstrumentation
Value Type : DWORD
Preferred Value : 1