hi as stated in thread title my computer is giving me some trouble and an once again stuck using my wii for internet purposes. the issue at hand: the first time i had this issue was maybe before thanksgiving but am not sure. i was on the internet watching videos on youtube. i closed internet explorer and i got the loading ring when it closed. (you know the mouse becomes the loading ring) so i waited. and waited some more. having needed to go to bed for work, i turned the computer off manually, which i knew was wrong but i couldnt leave it on all night either. the next day my sibling had used the computer, and claims everything was fine with it when they turned it on. when i turned it on it was locked in the start screen displaying e with del - start up f12 for boot menu. i tried both options and i evn let it sit on the meantioned screen to see what would happen. well, the thing wouldnt go into windows at all. i had sent it to the repair company my warrenty covers it under, (acer repair in TX). becuase on the ameritrends screen that came up it said 3rd master harddrive error. so i sent it away got it back 10 days later only to find in the return slip that it had no problems. i set it back up, turn it on and it loads up just fine. and foa few days it was fine but then it began locking again and i got the blue screen of death. i restart like it askes and since then, the past week, it freezes up and it shuts down. it wont load at all as described above, however, when off for awhile lets say an hour, when i go to turn it on it loads the screan that displays the options to start in safe mode command prompt etc. before i go on any further: windows 7 home edition 64 bit amd athlon II x2 220 dualcore processor Nvidia GeForce 6150 se graphics dvd super multidrive 1tb hard drive 3gb ddr3 memory multi in 1 media card reader those are my system specs. if that helps. i was thinking i should do a system restore, but what extactly does system restore do? also does anyone have any idea whats wrong with my computer?