You can try to disable everthing that starts with Windows.
You can do this by the following.
1. Start > msconfig.
2. General {Tab} > Select 'Diagnostic Setup'.
3. Restart the computer and then check again.
If this works, then there defenatly is a program that interfearce with PowerTools. You can now try to enable those software entrys one-by-one.
If then for some reason PowerTools won't start, then that program creates the problem.
Hope this will help.