Acer Aspire 6920 Freezing problems

My Acer Aspire 6920 Laptop freezes occasionally, and nothing but a cold shutdown fixes it. Sometimes after I turn it back on again, the keyboard is unresponsive until after I've logged into my Windows 7. If I was playing music at the time of the freeze, it plays the last few seconds of music in slow motion over and over again.

There does't seem to be anything in particular that causes the crashes (sometimes I'm running games, other times it was idling).

How can I stop it freezing?

What I've tried: Reinstalling my Windows 7 64bit, Installing the latest drivers (from various sources)

I took a video of the laptop in it's frozen state, if this would help anyone? If it would, I can upload it to youtube... Basically nothing but a cold shutdown (holding in the power button) does anything.

 

Check for harddisk status.
Could be imminent failure.
Backup important data first.

 

Agree with Weinter
First priority back up what you you need if you lose the whole disk/laptop

Look at windows event logs for any famous last words before the freezes
Download and run SIW, check temperatures and voltages reported are reasonable. Under storage you can drop down a box detailling the SMART status of the drive. If any actual readings are close to/below warning thresholds there is a problem.

Download and make a test disk on another machine for memtest 86+ ( http://www.memtest.org) and give the memory a going over. If still no clue download a graphics and processor stress test and give that a go . .

 

i used to have freezing problems with my 6920
i seemed to have fixed it by installing 'intel matrix storage manager"

dont know if that will work for you, but you could give it a try