Sorry, I didn't mention this but it's a AIO computer which is a few years old but I will try each RAM stick and run Memtest to see if there's any errorsHow old is the system? Are you running at stock speeds or overclocking?
0x8E BSODs can be caused by faulty RAM, so it's worth trying each stick on its' own to see if the issue persists. It may also be worthwhile running memtest.
I have used Hiren's BootCD to run Malwarebytes Anti-Malware and Spybot - Search & Destroy which picked up some viruses and I have removed them but still can't boot into Windows so I'm thinking of backing up my hard drive and install a fresh copy of Windows but how do I backup my Chrome and Firefox bookmarks?