What's up EVERYONE? I'm new here and also I'm not that good with computers..LOL, but my girlfriend is having a problem with her computer and I've taken all the steps I know, I will try to explain it the best I can:

When the computer first comes on it goes to a BLACK screen with an "F1" function for something like Simple start up and an "F12" function for.....Can't really REMEMBER, basically I'm trying to get the computer into safe mode, when it first starts up I "F8" a few times but it ALWAYS sends us back to the black screen I don't really understand. Hopefully I made some kind of sense and after that’s all said and done I am just trying to put the computer in safe mode to possibly restore it back to fix whatever error occurred. Thanks in advance for your help!
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I did read the rules of the forum, but like I stated in my question, I have limited knowlege on computers, sorry but I can't get anymore specific then what I wrote. If you guys can't help I understand.Try hitting F8 very rapidly and don't stop....you should do this before you start to see any kind of logo screen.