Prior to using the restore point did you follow any of the guides for speeding things up like the shutdown time or one for overall performance in 7? Once you used the restore point you may have gone back before the time any changes were made to the default Windows registry settings.
Hopefully there wasn't any problem with the restore point used. That would be another thing to consider where you may have to use another one to see things back to normal again.
One other thing to add here is always create a new restore point prior to installing any new unfamiliar program as well as the typical advice for most large program installs in the event of a bad install. This way you can recover a normal working Windows.