Windows 7 graphical glitches

Cannot explain so sending screeny.
To accompany that on occasions my monitor flashes off and on.
I first thought it was to do with the GPU drivers but looking at google it appears to be a tell-tale sign of near PSU failure.
This only happens in Windows 7, not Vista, so that leads me to believe it is drivers.
Could someone give some guidance?
Cheers.
To accompany that on occasions my monitor flashes off and on.
I first thought it was to do with the GPU drivers but looking at google it appears to be a tell-tale sign of near PSU failure.
This only happens in Windows 7, not Vista, so that leads me to believe it is drivers.
Could someone give some guidance?
Cheers.