As per your intructions I have:
-Installed and ran ATF cleaner
-I have tried to access system restore, but message comes up system restore is not able to protect your computer
-I have Installed ran Erunt
-Checked windows notepad
Step one: I have downloaded Malwarebytes but the set up failed"unable to register the dll locx create process failed code2"
Step two: I have instaled and ran Avast home edition and ran full boot scan
Step Three: Windows update- I have tried to access windows update in Internet explorer and firefox but can not access the site
Step four: I have rebooted the pc and tested the operation, however the faults remain
Step five: I await your advice
Regards
Alan