problem: computer would not boot. hard drive replaced (by shop), worked for awhile, started freezing up at desktop screen, shut down and reboot resulted in freeze up at login, recovery software used, hard drive reformatted twice,recovery again, same problem, then hard drive erased, recovery installed at least twice, work for awhile, then freeze up at login again.

Hi there, There can be a heating issue in your laptop . Please check your laptop cooling system is working properly .
Best of luck
Imran Khan
