Hi Everyone I've just joined to see if any one can solve my problem. My 2006 Macbook pro, upgraded with 3 GB Ram and 128gb Crucial SSD is hanging up with the spinning beach ball of death every time after precisely 1 hr 00 secs. After manual shut down with the button, it re-boots as normal in 55 seconds, is superbly quick, no problems until the hour is up. So far I have replaced the LH Fan, removed fluff blocking the fan vents, replaced the paste on the heat sink with Arctic 5 so running totally cool and silent. Fixed minor problems with the hard drive using the scary black ops page with white writing, sorted out disc permissions, cleared cache in Safari, looked at kernel panic and k ext files. I've also tried booting of the old drive connected externally which predates the issue but still crashed and ran the macbook last night with no programs or apps running and it still froze after precisely 1hr. Any ideas? should I do a clean install and start from scratch?