Hello, I've been running a Q6600 quad core on a MSI MS-7366 (CPU 1) MB, OS=Win-XP. I've always seen four cores in win task manager. Lately I've had a problem with the CPU fan which must have caused the CPU to be running for a few hours without cooling. Then I noticed and adjusted. CPU temps are now down to 42 °C (idle), 65°C full load. But task manager, registry, CPU-Z and Speccy report only ONE core. BIOS has no core options, as far as I can see.
I've already reinstalled windows, but to no avail. The core remains ONE.
My question: is it possible to get the other three cores back? How?