I recently repaired a computer and removed a lot of spware for a customer. I just got the computer back with more viruses - new ones as far as I can tell. Microsoft Security Essentials has been disabled and something called SpyHunter has been installed - probably not on purpose.
I cannot reinstall Security Essentials while there is another antivirus installed. SpyHunter does not appear in Add or Remove Programs, nor does it have its own uninstall program.
The only comments that I can find about SpyHunter indicate that several years ago it had been listed as malware, but that it has been delisted - making it legitimate, I suppose. Neither Malwarebytes nor Superantispyware even reported the existense of SpyHunter. In any case, the lack of being able to uninstall a program is so annoying that I really want to get rid of it.
How can I uninstall SpyHunter?