Hi First of all, i am new to mac so i dont know much about it and how to do things- Anyways, I've just received my iMac 27" 2.9GHz i7 today. (finally).. and ive added 8GB RAM(4x2) straight after unpacking it. (got them from mrmemory) Its been about 3 hours since I turned it on- I have been basically trying to install adobe collection/office etc- but it got frozen 3 times already, i don't think this is normal- even my 3 yr old laptop doesn't do this. I was installing Adobe when it happened for the first time, the % mark just stopped going up and i couldn't do anything else, i couldn't even shut it down through apple button but had to press the power button on the back of iMac. It happened again when i was moving photos from my external hard-drive to iPhoto. This is a brand new machine and has 12GB RAM (4 basic + 8GB), so it should not have this kinda problem. is this because of these two new RAM? (they are both new as well, i got them out from the package right before installing them- and my imac recognises them) Also the whole machine is really hot, especially the top of the monitor is just 'scorching'- I have absolutely no idea why my new iMac is doing this, and im really disappointed - can anyone tell me why and what i can do please?