Hi guys, So here's the score: iMac 27" i5 with win7 on Bootcamp. I had 8Gb RAM, but recently I bought some cheap extra 8gb, so I'm using 16gb now. I noticed that sometimes hibernation was not functioning properly after the upgrade, but I don't remember if it happened before. I had it hibernated and tried to bring it back to life. It wouldn't so I switched it off. Starting up again, it asked me if I wanted to go back to the hibernated session, I said yes. Windows started, but I got some error boxes, so I decided I better restart the beast, which I did. It took ages to turn off, so I just pressed the button for a couple of seconds and it went off. Tried to turn it on and it said there was no bootmanager, and it won't start. Started it with OSX and when I try to see my windows files, most of them are gone! But the system says the disk has 200gb free, which it had before, so apparently no files are gone, but they are not there... Or at least I can not see them with OSX... All my work is in the windows system. I do have backup external disks of my most important stuff, but I would really like to recover my system. Do you think the cheap memory is to blame? Or could it be something else? Thanks for your help!!!