Random Blue Screens

Ok, I just cannot get to the bottom of this, each day when I turn my pc on I seem to either get a blue screen or my pc reboots just before windows. I have done a full system test which seems to come back ok with PC Check. I think all my drivers are up to date.

My pc is:
MSI 785GTM-E45
Phenom AM2+ Quad 2.3
1tb Samsung F3 HDD
Sata DVDR
2bg DDR2 800
Nvidia GTX460
700W PSU

Pulling my hair out over this, I have even tried a reinstall.

I have attached a copy of the last blue screen.

A point to note is that it happens only after the pc's off a good while, at least thats when I notice.

I can then us it for hrs with no problems, just seems on that 1st boot.

Disable ReadyBoost

This was likely caused by the following module: rdyboost.sys
Bugcheck code: 0x1000007E (0xC0000005, 0x82E867F3, 0x8AFD7B1C, 0x8AFD7700)
Error: SYSTEM_THREAD_EXCEPTION_NOT_HANDLED_M

Thanks for your prompt reply, I have set the superfetch service to disabled. I will leave the pc off for a cpl of hrs and see if it helps.

Do you think this will have an impact on my system performance with this disabled?

Any idea what may cause this to give my system problems?

Once again thanks for the prompt reply!

Robert