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Windows 10 PC hijacked

I have a Windows 10 PC which I have just updated to the latest Windows 10 Insider Preview Build 1709 (OS Build 17074-1002). I now find my PC is haunted with hijacked web pages, unwanted ads, videos, music, etc. I never know where I am going to be misdirected and some sites I cannot access at all without being diverted. Ironically one site I cannot access is Experts Exchange without my PC going off in some adventure of its own.
Website-Hijacked.docx Failed-System-Restore.docx
I have done antivirus scans using Windows Defender and AVG Internet Security Suite. Defender did find some viruses which it dealt with but my problems remain the same. Can anyone suggest a way forward?
I did try to uninstall the latest Windows 10 update but could not do that either, screenshot attached.

ASKER CERTIFIED SOLUTION

John

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SOLUTION

medcomputers

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Ramin

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nobus

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SOLUTION

Hello There

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medcomputers

ASKER

Hi I carried out John Hurt's suggestion and it seems to have worked first time, many thanks. I have taken note of all the other suggestions especially that from Hello There which I will work through should the problem return.
I am not sure about the comment by nobus comments regarding not posting screenshots in a Word doc. I have always saved my screenshots in that way in order to save them. Should I just save them as .png? I have just tried saving this comment and did not realise you could save file as .png.

Thank you

Matthew

nobus

no - use the snipping tool, and post them as is (png i believe)

medcomputers

ASKER

Thank you everyone for all your suggestions.

John

You are very welcome and I was happy to help.