So I've reseated the RAM, and checked other possible programs for auto-updates but nothing outside of Windows own plus the likes of BitDefender and Dropbox. I can't even find anything unusual running in Services or PRograms at the time of the event, which makes it all the more odd. I've also gone through all the Logs I can find but again nothing shows up for any reason at that exact time, so again feel it has to be hardware more than software.

I might go & investigate this RAM further as it's a new set I was testing for Amazon but think they're fairly solid (KLEVV Fit 8GB 240-Pin DDR3 SDRAM DDR3) but given they're the most recent and only hardware change for a fair while, it may just be that they've something to do with it.

Hopefully so - it had me worried initially as I'd heard stories of scammers etc being able to make your PC do strange things

Thanks anyway