Reinstalling the system after computer poisoning did not solve the problem

Computer shop news My computer was poisoned once this time last year. After installing it many times, the system has never been better. I said the last time. I just installed the system yesterday. I played a day yesterday and found no problem. I came back from work today. Open the computer QQ will automatically close, open several times is like this, then open then QQ can not open, and again install QQ can not be installed, and then the next QQ2012 is still not installed, open the installation display "ld" ; Unable to verify the publisher & rdquo; & ldquo; Run & rdquo; installation finally shows "failed to extract the installation file".

Yesterday's installation and update to the latest Kabbah 2010 database is also inexplicable damage, the screen will also flash when the screen opens, minimize the page does not flash, open and flash. 1, I can be sure that it is not a hardware problem: I went to ASUS customer service last week (I am a notebook) 2. It is not like a system problem: I just installed the system yesterday. 3. It should not be a virus problem: And I still Format and repartition the entire hard drive, before scanning the entire hard drive with the genuine Kabbah 2010. My computer problem has been bothering me for a long time. I never knew what the problem was. I almost collapsed (I urgently need a computer). User analysis and answer: It is likely to be a virus, because you just reinstall the system, the other few disks did not move, the original symptoms of poisoning, some powerful virus reinstallation system can not solve, only put all the hard disk The partitions are formatted before installing the system. Also don't know what version of the system you are installing? GHOST? The original version of WIN7 is installed, reinstall the driver, and then activate it for use?