sgagk.pif the developer is Unknown .
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Not all processes can be uninstalled without the help of a 3rd party tool, especially malware. To see if it can be uninstalled, first go to Start > Control Panel > Add/Remove programs.
If you have any problems with sgagk.pif, you may try using a registry cleaner or a speed-up software to check, analyze, and fix problems that are affecting the performance of your computer.
You may try contacting Unknown, the developer of sgagk.pif and ask for more information.