Vista won't load on Toshiba Satellite A205-S5000 Laptop

[jdlepage]

Good Day.

I have a Toshiba laptop that will not successfully load Vista.

It appeared to be working properly, until I ran an AVG virus scan. It was running slow, but okay for about 4 hours and I left it go.  When I returned to the unit, screen was on but dark, lights on and wouldn't 'wake up'.  Eventually powered off and has not been able to load to completion.  I do get the error screen with the option to repair the start up; I accept that option, but never get more than a on-but-dark screen; power is still on.

What next?  No Vista CD, just the key on the bottom of the unit.

Hope someone can help.

J

[GlitchPC]

Can you boot into Safe Mode?  BIOS?

[patio]

Vista Recovery CD .iso DLoad.

[jdlepage]

Tried starting in safe mode - several 'windows/system32/drivers' loaded, but then stopped at crcdisk.sys; after about a 2 minute stall, machine restarted and I got the Windows Error Recovery screen.  Two options here, starting in a repair mode and starting normally.  If I try to start normally, I eventually get a blue screen flash and then a reboot; if I try to start in repair mode, it goes to the never-ending on-but-dark screen. 

Don't understand the question on the bios.