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What should I do when Ubuntu freezes?

I'm running Dell Inspiron 15R with Intel HD graphics, 3 GB RAM, 64-bit operating OS. The problem is my computer freezes randomly, the touchpad gets stuck, nothing to do but to shut down by manually pressing the power button.

I made a clean install today of the Ubuntu OS and 30 minutes later, there is no overheating in my laptop nor any loud fan noise. What could cause this issue?

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marked as duplicate by Jorge Castro, Mitch, jokerdino, Amith KK, Eliah Kagan Aug 13 '12 at 20:19

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I would recommend running a diagnostic test on your hard drive and also try a diagnostic test on your RAM. I never used Linux a lot but I think the same tasks required to troubleshoot and repair problems with Windows would also apply to Linux, just different ways of doing things.

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Thanks, Brandon, ill try to do a ram and hdd diagnostic test and post the results if thats whats causing the problem. –  Daniel Rodriguez Aug 15 '12 at 2:59
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