.how to add (boot.ini) this file
This works in XP.
Right-click "my computer" and select properties. Go to the advanced tab. under "startup and recovery", click settings. Under system settings, click the edit button. There will be a line that looks something like this:multi(0)disk(0)rdisk(0)partition(2)\WINDOWS="Microsoft Windows XP Professional" /noexecute=optin /fastdetect
Add /usepmtimer to the end of that line and save the file. If it doesn't work for you, you can always remove that setting.