Installing App - "another version of this product is already installed"

[Rotty]

I have a windows XP laptop and an application on it corrupted somehow ( Activclient )

I tried to reinstall but got the above error, went to uninstall from add/remove but it wasn't there

tried to remove everything I can find manually, deleted main directory, searched for files using names I knew were part of it and deleted them, then used regedit to delete all registry entries I could find but am still having the same problem

any ideas ?

Thanks

 

[Rotty]

thanks folks, tried the techguys page, some usefull info, found some other files / reg entries that I hhadnt shifted but still no good

will try those other reg search tools next

 

[Rotty]

found more stuff with reg commander, cleared those but still same

tried procmon but there are millions of entries and I have no idea what I am looking for

 

[Rotty]

Windows Installer CleanUp Utility (Google for a download, a few locations/versions around)

Let it run and delete any entries it finds for that App. Has worked for me previously before when all else failed.

Thank you very much, that sorted the bugger

just to got to clear a couple of issues caused my registry changes now