So yesterday I woke up to have my brand new iMac froze(I could move the cursor but couldn't click anything). I shut it down and turned it back on only to get stuck on the grey screen. Restarted ran disc utility, checked and verified, restarted, still got the grey screen. Ran hardware test, came up ok. Reset PRAM nothing. Tried reinstalling Mount Lion, got stuck on negative time remaining( I let it go over night and it got to -6 hours plus). Contacted Apple Support and they just ran me through things I've already done. Called Apple Support back and ask for a senior tech who has me running an internet recovery which I don't think I tried before. Hopefully this works, never had a problem with my other iMacs other than having to replace a HDD on an older machine. This is so frustrating. ETA: Have Genius appointment for later today. If they can't get it to work I don't want a repair, I want a replacement.