Computer minimizing to desktop

[Legacy97]

My computer is about 1-2 months old, i have build it my pc myself, but from the first time i used it, it have being minimizing to desktop, when i'm in game, it doesn't take more then 1 minute before it minimize, even when i dont play games, and i just is on facebook ore something, goes it to desktop in the backround! I have tried to turn the aero off and use gamebooster when in game, but nothing helps! Please help!!

specs:
-----------------
cpu: I5 3450k
mainboard: Asus p8b75-b
ram:8gb
Graphics: Nvidia geforce 9800 gtx

Win7 ultimate 64-bit

 

[mitchell65]

Hi and welcome to the Forum!
HAve you got an up to date anti virus software installed? Do you use Malwarebytes or similar?

 

[Legacy97]

Hi and welcome to the Forum!
HAve you got an up to date anti virus software installed? Do you use Malwarebytes or similar?

I tried to update my anti virus software, but it didn't help.. I use AVG Anti virus

 

[mitchell65]

I would uninstall AVG if you are running the free version and install and run MS Security essentials. Then download and run Malwarebytes!