Originally Posted by
wuyuejin
100% your computer has been infected with malwares. Freewares like Ad-Aware,... is not gonna work against this kind of problem because they're just too weak while the malwares have millions of ways to hide themselves. If I were you I would download a trial version or purchase a full version of one of the most powerful anti-malwares out there such as Kaspersky Antivirus, Kaspersky Internet Security, BitDeffender, NOD32. Everything would be done in hours. Btw, do not forget to turn off System Restore before you scan for malwares and viruses.