Attention this is a registry tweak!!!!
Back up your registry PLease look at this guide
How to back up your registry prior to doing so
Download install and update Ccleaner
After installing and updating go to options - advanced and tick prompt for registry back ups
Now Start up in safe mode
Do two runs
1) Click on problems and tick all. Click on analyse. At the end you will be prompted for storing a backup.
This will be stored, as a default, in My documents.
2) Click on cleaner click on analyse and accept all files to be removed.
This will remove any unattached registry items.