My SSD Hard Disk freezes intermittently.

My notebook is an Acer 3820TG and I have been experiencing random freeze-ups since I installed the SanDisk Extreme 120G :confounded:

I have tried to set the HIPM to active according to drlucky’s link. After setting it to active, it worked, but after the notebook is restarted, it returned back to original setting. For some reason unknown to me, the new setting is not saved in the sysem.

Anyone can offer any help ?

Thanks very much !