So as of four days ago, my Vista-running Sony PCG model laptop with integrated graphics started doing something odd whenever resolution changes (for example, when starting up a game) - the screen cuts out to a blank white screen and the computer seems to lock up. The screen isn't entirely blank white though - odd dark patches will appear in certain spots and move around. Nothing works at this point except a hard shutdown. In addition to that, on hard shutdown and restart, Vista will fail to boot several times and display the exact same blank white screen, with no ability to access BIOS or interact with the boot sequence. Upon successful boot I get a 'windows failed to start' screen, but can then boot normally. I'm scanning for malware now but I don't expect anything, and I would like some input as to possible causes of this so I can narrow my plan of action. Reinstallation of display drivers is the first thing that comes to mind but that's kind of a last resort, and if the display connectors were faulty/out of place I'm not sure the laptop would appear to boot at all until I connect to another monitor (which I will do as soon as the problem manifests again).