Hello everyone, I have at the moment an iMac 2.0ghz 2gb ram, 20 inch from 2007 which has problems. The problem is that once in a while the machine just freezes. Everything is stuck, except for the mouse for some weird reason. Also I am able to connect to the iMac via the network (connection established after freeze), and able to copy files from the iMac. This does not happen under particular circumstances (or at least I do not know of them yet..) The iMac has been to an authorized service provider here in the Netherlands, however they said it could be the lcd, graphics card or the logic board.. I have tested the iMac with Apple Service Diagnostics, and it doesn't show an error.. Techtool Pro 6 passes everything. Running ram tests with Rember for extended periods of time also is fine. A CPUtest running at max cpu runs fine as well.. CPU usually stays below 60 degrees celsius. My next step is completely formatting the harddrive and either reinstall 10.6.8 (which is on there now btw) or go for lion. Long story in a short question -> What could cause freezes where the harddrive is accesible through the network and the mouse can move, but nothing works? Any other ideas of what I should do?