yes... registry.
The easiest way to delete the enntry (and lie to Windows about and installation) is the use Ccleaner and delete the installation entry from the Registry.
Download Ccleaner (cnet is quickest)
Install it
Open it
On the left are a series of selection areas.
Cleaner - temp file removal, this is also what gets activated if you right click the Recycle Bin and click "Run Ccleaner" Adjust the settings to include (Windows tab first)
Windows Error Reporting
DNS Cache
Old Prefetch
(Application tab)
any unchecked boxes from the "Multimedia" entry down
Now (lower right) "Run Cleaner"
Repeat until "0 bytes removed" results returned
This is the "first run cleanup routine I always run... Now go back to your Browser entries and uncheck "Internet History" and "Cookies"... Also in the "Windows" tab I unselect the "Windows Explorer" Run and Other Exploerer MRUs
Move to "Registry"
Click "Scan for Issues"
Once complete click "Fix selected issues..." I've never had an issue with this causing a problem... However, if you are paranoid, let is backup the Registry before the fix step, then select "Fix All Selected Isues"... again, repeat until the found items repeat or nothing is found.
Tools section
"Uninstall" Here we have all the installed application as you would find in the Control Panel. Find the offending application and try to run the uninstaller, if/when it fails, this time do the "Delete Entry", this removes it from the Registry.
move to the "Startup" section. Here you can effectively turn off startup items by Disabling them. Typically, I turn off everything that is NOT hardware related or Security related.
Thats it... Reboot.
Now try to install the application.
Was this more than the basics... yes... however it will be a quicker and cleaner system for doing this as well as being able to install the AFU application.
Enjoy!