我剛剛砌了部電腦.但每玩了1-2分鐘就彈回桌面??

because you have something that is popping up!....
for example...
if you are playing that game and press shift 5 times,then you will be back to desktop!

Solve method "dangerous?"... go to the TaskManager "Ctrl+Alt+Del"
Processes > find that program name & remember the name! >End Process (keep repeat)
so you need to have keep testing by play game then if pop up again,then do it again....
if it stopped, restart computer, when computer finish loading go TaskManager again > Processes >go to that program name,that you have deleted last, right click>open file location

delete that file!!! if virus, it will give you no permission, so you need to download that app online that give you full permission(forgot the name :-P but its easy) then you are done! it should not occur again...

All the Best!

2012-10-27 11:14:37 補充：
因為你有東西是跳出來的！......
例如...
如果你是玩遊戲，然後按shift5次，你會回到桌面！

解決方法“危險嗎？”......去任務管理器的“Ctrl+ Alt + Del鍵”
過程，找到該程序的名稱和記住這個名字！ >結束進程（不斷重複）
你需要玩遊戲去測試，然後再彈出，然後再做一次......
如果它停止，重新啟動PC，當完再次去任務管理器>進程>進入到該程序的名字，Mouse右鍵>打開文件位置

2012-10-27 11:18:33 補充：
刪除這文件！如果病毒，它會不給你權限，所以這時候你需要下載該應用程序，讓您充分的權限,
我忘了這個程序的名字 :-P，很容易找到, 應該不會再出現...

所有最好！

唔玩遊戲有無事?
玩其他遊戲有無問題發生??
有無重新安裝遊戲??
是否正確安裝驅動程式??
如想知更多電腦知識,可參考系統電腦教育中心的實用電腦全科證書課程
http://www. systematic.com.hk/computer.htm?id=18&sub=1071

講中文啦~~~~~~~~~~~