My Avast pop-up is consistently reporting multiple Windows key files as malware, most notably; Rundll32.exe/scvhost.exe, WWAhost.exe and Agent.exe (Not a Windows file, but a battle.net installer)
Once opening Task manager, no suspicious programs appear open, however the system task(Ntoskrnl.exe) uses 100% disk majority of the time, running a Mbam scan revealed no virus’s, and Avast scans also yielded no results.
Why did you install Windows 10 Tech Preview as your main OS? I found the beta to be extremely unstable, and they even tell you NOT to install it as a main OS. I tried a dualboot. Mind you, it failed, but, Windows 10 belongs in a Virtual Machine until formally released to the public as Finished and not Beta.
Download ComboFix from one of the following locations: Link 1 Link 2
VERY IMPORTANT !!! Save ComboFix.exe to your Desktop
IMPORTANT - Disable your AntiVirus and AntiSpyware applications, usually via a right click on the System Tray icon. They may otherwise interfere with our tools. If you have difficulty properly disabling your protective programs, refer to this link here
[*]Double click on ComboFix.exe & follow the prompts.
[*]Accept the disclaimer and allow to update if it asks
They were run once files that pointed to a temp folder using a system programme. Run once are just that they should not be there after a reboot. Plus they use run32 which operates under svchost