Quote: Originally Posted by Alejandro85
Probably it's due to leftovers from a faulty uninstall or simply that the uninstaller didn't delete something
From what I understand it's files that gets left over that makes CCleaner think a program is installed when infact it isn't.
To solve the problem I searched "appdata" in "run" and then within the 3 folders that showed up I searched through each one and deleted the folders I thought I didn't need (programs I had already uninstalled via control panel).
After doing so I opened CCleaner and Thunderbird was gone
amongst a few other programs I deleted via the appdata method.
However certain programs failed to get removed like this so I had to delete the program entries manually myself through the registry.
CCleaner now only shows the programs I have installed. My original problem may be small but it's quite annoying as Thunderbird had a load of other options, was at top of list within the applications section on CCleaner of which then meant I had to scroll down the list!
Meh if anyone reads this, it helped me to remove programs in the CCleaner list and also if planning to edit the registry perform a backup as editing the registry can easily mess up your computer if you don't know what your doing properly.