Hi all, I am in need of some help with my iMac 2012. I encountered a problem a while a back which resulted in me needing to reinstall OS X. All was perfect, until roughly a week ago when I turned off the Mac. When I turned it back on in the morning, it took ages to load up, and then was extremely laggy, slow and unusable. After restating a few times, it wouldn't load up at all. I booted into recovery mode and verified the disk, which showed what appeared to me as a minor error, where a value was a digit out which it repaired. However, it still wouldn't load. I have been away but upon getting back, I have reinstalled OS X using the recovery mode. The Mac now boots, but is still laggy and unresponsive. I have also tried resetting the VRAM (think that's what it's called) but have no luck. It strangely doesn't seem to recognize my keyboard, and comes up with Bluetooth assistant upon booting up. Apple Hardware test shows no errors. Does anybody know what to suggest? Thanks.