Why won't my Acer start up?

My Acer Aspire 5515 laptop wont start AT ALL PlZ HELP!!?

• So last night i was on facebook when my computer shut off, when i tried to turn it back on for the first few times it wouldnt do anything but now when u turn it on it says: windows failed to start. A recent hardware or software might be the cause. If windows files have been damaged or configured jncorrectly, Startup repair can help diagnose and fix the problem. If powere was interupted during startup, chose start windows normally (use the arrow keys to highlight your choice$ launch startup repair (recommended) Start windows normally i have done both of the opyions and all it does is take me to a black screen with a neverending loading bar ALSO it say to press F2 for setup PLEASE HELP THANKS SOOOO MUCH!!

• Answer:

  Sounds like a serious fault, windows shuts down like this to prevent damage to your computer. One likely cause is a failed RAM Module. Undo the cover at the back of the laptop and remove one of the memory modules and see if windows boots. If you are not confident with that then take your laptop to a computer repair shop. Acer laptops come pre-loaded with a recovery partation that you can loaded by pressing F11 as soon as the PC turns on. You will lose all you data though if you do this - I hope you have been keeping regular backups.