I am using an HP Scanjet G2410 scanner and previously installed the software on my external hard disk. The external hard disk stopped working and the software got deleted.
I used Revo Uninstaller to uninstall the Registry Keys and remaining files. For three other softwares, I located the registry keys and deleted them.
Now, when I try to install the software again, I find it telling that three softwares are installed (not what I deleted the registry keys for). I need all the software installed for the scanner to work properly. The software is not seen in Revo Uninstaller now.
