Well combofix found nothing. Please Uninstall it by following these instructions exactly:
* Click START then RUN
* Now type ComboFix /Uninstall in the runbox and click OK. The space between the combofix and the /uninstall, it must be there.
When shown the disclaimer, Select "2"

Now one thing you need to check is this:
Go to Services again...

Go to Start/Administrative Tools/Services/Themes. Set to Automatic
and make sure it is Started.
Reboot and see if that makes a difference.