Hi everyone.Glad to have found this forum.I have a N150 that got banged around when it was on and now windows 7 will not boot. my son said the F4 key worked twice, but he said the recovery program was taking too long so he shut it down. Ughh! I know I wish he would have just waited till I got home. Now the F4 key will no longer bring up the recovery program. It just says " operating system not found". I can get into the bios and it does have the hard drive listed as " sata1" I think. I have been reading through some related posts and still a little confused. It sounds like I should be able to download a copy of the recovery program or admin tools to a stick. Change the boot sequence in the bios to boot to the usb port, and try and recover the harddrive from there. one problem is some of the links I have found for these programs are bad links. Does anyone know exactly which program I need and have a good link to it? Thanks.