OK lets remove Firefox
Download the attached fix.txt
Start OTS. and then click the Run Fix button.
OTS will then ask for the location of the fix.txt Locate the fix.txt you downloaded and then press run fix again
The fix should only take a very short time. When the fix is completed a message box will popup telling you that it is finished. Click the Ok button and Notepad will open with a log of actions taken during the fix. Post that information back here
I will review the information when it comes back in.