How to back up the Windows Registry
Invalid Entry Removal Instructions:
1. Go to Start>> Run. Type in: regedit [Enter] or click OK.
2. Navigate to the following registry key:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall
3. Expand the Uninstall entry by clicking the "+" symbol.
4. Below, you will now see all of the programs listed in the Add/Remove Programs menu. At the start of the list, you may see many {GUID} entries (Globally Unique IDentifier) which are a random set of letters and numbers encompassed in brackets ({ }). In order to know what program these are, click once on the {GUID} and notice its "DisplayName" in the right pane (see fig.1).
5. If the invalid entry you are searching for is not one the {GUID} entries, keep scrolling the Uninstall list until you find it.
6. Once you have located the invalid entry, save the Registry entry to a file, then go ahead and delete the entry by simply right clicking it and select delete.
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