It is very likely that imguninst.exe is adware or malware. This file, and possibly others, are running in the background on your hard drive. Removing these files quickly is very important.

imguninst and it's associated process, ABetterInternet ImGiant Spyware, are known to be a type of adware. Adware and viruses can be very tricky. Malware creators know their files will be removed if found, so they sometimes give the files names that are similar to known legitimate files.

To be sure that you are not removing legitimate files, use 's free scan of your hard drive.

If imguninst.exe was on your hard drive, there is a good chance that more virus is lurking. Scanning your hard drive for free is the best way to avoid major problems in the future.