So i was on windows 7 when i had to go get some food. I closed the lid for it to go to sleep but relized i had to keep on download files so a second or so after closing it i reopened it. Too my suprise the screen was black but it was still running as i know as i can hear the fan and the little blue light that says wifi is on was blue which means on. When its on sleep it goes red. I tried pressing it and the power button but no reponse. I closed the lid for a while but it dident go to sleep. I had to do a hard shut down (Hold power-button down till it shuts off) and start up. Shortly after i had a windows explorer crash. How can i stop it doing this. I had this before and this made me have to reinstall 7 as a dual-boot as before it was my primary but then as i couldent use it i went to dual-boot. Please help. Btw, Its windows 7 rc and i had all updates. The wierd thing is other times it sleeps just ok and resumes like vista does.