Hey everyone, At my work we have a 2011 mac mini running Lion up to date etc. Its been lagging a bit with Photoshop and Premiere etc so I said to the boss I can bump it from 4gb ram to 8gb. Followed the instructions as per the apple website and hey presto we had a snappy little mini. Then after about an hour whilst browsing on Chrome we noticed every now and then the page wouldnt load and give a screen saying "Oh Snap" something happened but we dont know what, or something to that effect. I thought it was our net but then after a while I got a full screen saying an error occurred and I have to restart the computer. All seemed fine after a re-boot, then started getting those "Oh Snap" screens in Chrome and then the same Restart Computer message. Other than that other programs had been running fine. However this time it wont reboot. It gets to the grey screen, and a bar starts to load below, it loads 1/4 of the way across and then switches off. I though, hmm bad ram so slotted the original ram back in but no luck. Can not get passed that load screen. Iv booted into recovery mode and done a disk check, all good. Repaired permissions, all good. But will not boot. Im out of luck does anyone know whats going on or had this before. Iv checked the rams seated properly. Have I stuffed something or has something else happened coincidentally at the same time? If i cant get this sorted I can go for a trip to the genius bar (under warranty still) but id rather sort it myself in the morning because I'll never live it down at work for "breaking the mac"... Help me!!