Computer freezes after waking up from sleep/idle/standby

[garychencool]

So the computer goes to sleep/standby after idling for x amount of minutes and 10 percent of the time it freezes. I move the mouse and I see the screen that I left off at, I can move the mouse but once I press something it freezes for 30 seconds to 2 minutes. I cannot press anything, no Ctrl+Alt+Del or Windows key on the keyboard, I have to wait for something to start up and I don't know what exactly is causing this. I'd assume it has something to do with the hard drive(?) but I haven't looked into those settings yet, because what I see on the screen is what is in RAM. Maybe something in the power settings.

PC Spec:
Intel Core i5 760 @ 2.8GHz
4GB RAM
Windows 7 32-bit

Any ideas?