Changing the list of programs Add / Remove Programs
When you install a program then the program (which is good) will of course
add to Unsintall (in the Add / Remove Programs). But when you
have uninstall the program and there are still at the entry
Add / Remove Programs You can be manually removed.
Entrance to the key: HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows \ CurrentVersion \ Uninstall
After that you can delete the entry remaining.