Random Freezes

#1
Hello, i have recently installed windows 7.
When i start up my computer in the morning and go do other things. I come back around 10 minutes later and my computer is frozen, the only way to unfreeze it is to shut my computer down or Hit Alt Ctrl Delete, which takes around 2 minutes to load. Also this does happen if i go away from my computer for roughly thirty minutes or more. This is a pain sometimes. I'm just wondering if anyone else has experienced this problem, or and if they have a solution to it?
Thank you
 


#2
No one has encountered this problem?
 


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