Constantly being tabbed out

Hi I am running windows 7 home premium 64 bit and I keep constantly getting tabbed out of anything I am doing. It sounds like something is opening in the backround but there is no process for it/any that shows up. I have scanned my computer multiple times and I even got to the point where I reinstalled by OS. When the "thing" opens in the backround, it sounds like you opened a file in the "Computer". If you have any suggestions or know what is wrong please let me know!
Thanks

If this started occurring recently, I would suggest performing a System Restore to before when this started happening.

Darician said:

If this started occurring recently, I would suggest performing a System Restore to before when this started happening.

Did that earlier today

i'm sorry, i can't wrap my head around this. what do you mean by "getting tabbed out"? all windows minimize? you lose focus on the foreground window? what do you mean?

If I am say on firefox or talking to someone on msn, it will randomly select something else, like it was starting up another program but nothing pops up. Its annoying cause it happens quiet often weather I am playing a game or just sitting here

Bumping this because I still have this problem if anyone has any kind of suggestion or fix for it

strange. try this: click the start button, type in "psr" (problem step recorder) right click it and run it as an administrator. then hit start. do whatever you do as normal and then hit "stop recording" once you "get tabbed out" of a program. it will ask you where to save a VERY BLOATED zip file. save it whereever, and then upload it to a free file host on the net. then post the link to your zip file here and perhaps it will contain some insight as to why your programs get "tabbed out".

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I was just watching a series talking to some friends on skype like I normally do, and I did it again

Built my own desktop