I have an Acer Aspire ES1-512. Windows 7.
This morning it was working just fine. I rebooted it for some reason (don't remember now). It installed an update and then when it loaded up again it was reeeeeeeeeeeeeeeeeeeeeeally slow. I thought rebooting again would help. Now it shows the Acer screen, then goes black. I tried rebooting and tapping the F8 key (I am on my other computer now that said I could get to safe mode that way) so I could roll back to yesterday. That does nothing. Another page said trying F11 or F12. Both of those make the computer say "Preparing Automatic Repair" then it either goes black, or I get a blue screen that says there was an error and 
and that it is collecting info, then it shows another message, but it disappears and the screen goes black before I can see what it says.
This is very frustrating. I need this computer to do my art on. I've wasted the entire day now and haven't gotten any work done! Please help.