If you're running factory preinstalled WIndows 7 then it's no mystery at all. That is a corrupt install larded with bloatware and crapware utlities that duplicate better versions built into Win7. No tech enthusiast would run such an install but instead do a Clean Reinstall - Factory OEM Windows 7.

You can try to Clean Up Factory Bloatware but the preinstalled bloatware is so pernicious it damages system files just to remove it, and smothers WIn7 native performance to leave it. So the reinstall is the only way out.