When my son turns his computer on, it comes on then it stays on the black screen with the green thing moving........and just stays there like its trying to boot but cant. When it comes on it says "windows failed to launch, may be a hard ware or software issue" then it tells me to click either, system repair or start normally. I have done both......nothing...I have gone and done F8, nothing, even F12, any advice? he has an Acer..........its only 2 years old and of course, no warranty.........................