Using an Acer Aspire 5100 laptop to test drive the W7 RC. The problem i'm having is that every time I put my system to sleep or close the laptop lid, the system freezes. My screen shows nothing, but my computer powers up after hitting the power button (but nothing is being processed). I have to then manually shut down and restart to see anything then. Any idea how to fix this?

Have you installed all the latest drivers from Windows Update? If those don't work, you may try motherboard drivers from your hardware vendor. -Nick