I bought a thinkpad T420 last month and have the random freeze problem on windows 7 64 bit like many of your computer. I had tried a lot of ways but failed to solve it.
a few days before I was trying to test the system's thermal capability with a tool. It takes about 30% of CPU on backend. The testing lasted for 24 hours, the machine was still running! the CPU temp is about 72C. The machine freezed after 1 or 2 hours after the test program closed.
After that I always keep a testing program running on backend. It takes about 15%-20% of the CPU, the machine haven't freezed for a few days!!! That is really crazy but it works!
hope this can be helpful.
a few days before I was trying to test the system's thermal capability with a tool. It takes about 30% of CPU on backend. The testing lasted for 24 hours, the machine was still running! the CPU temp is about 72C. The machine freezed after 1 or 2 hours after the test program closed.
After that I always keep a testing program running on backend. It takes about 15%-20% of the CPU, the machine haven't freezed for a few days!!! That is really crazy but it works!
hope this can be helpful.
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