Labtop frezzes

hi my labtop freezes all windows except the one im on until i press ctrl alt delete for example if im on techspot.com and i want to click start i am not able to untill i press ctrl alt delete

i have and Acer Aspire 3002LCi labtop
 
Try doing an Acer system restore... You should find this restore function in the Acer utilities section of "All Programs"...
 
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