Optimum Installer virus removal

I installed a program called Optimum Installer last night. After several minutes, AVG identified it as high risks that can harm my computer. I have been using Optimum Installer on my previous laptop running under Windows XP. Now that I have acquired a new one, with Windows 7, the program seems to be not running well with the system especially with security products.

I did another test using MS Safety Scanner and it did not detect the threat. It could be a false positive or virus is hidden on part of Optimum Installer download files. I supposed I have acquired the exe file from unknown source. What I wanted to do now is remove the program from the system and make sure that no more remnants of the virus. The problem is I cannot find where to start uninstalling Optimum Installer. Please guide me.