Joseph Loo:
Have you checked your memory? You can do a memory check with the installation disk.
Karl Larsen:
Why would that be a problem?
It could be faulty, or not compatible with your board. That happens.
And how do you do a memory test with the F7 installation disk?
Run memtest86+ from the prompt, see the F key hints for help. Boot the install disc, read the text, don't start installing.