Beside that, whenever I tried to use Windows Restore to restore my problematic PC back to previous known system states, but my windows always said "The system makes no changes" even after it had gone through all apparent restore processes and rebooted.
So is it a SIGN of security alert or virus infection in my above PC because I would have thought the Windows Restore function should have been functional rather than being disabled as well!!!! I have scanned my PC with Malwarebytes and Avast in separate occasions via their 7 days OLD definition files (because I cannot access to my internet to update their files) and found nothing . So is there any GOOD standalone virus scanner/s, being able to install in either DVD or USB memory, that I could use to decide if my PC is INFECTED and causing my above mentioned internet issues???
Moved to Plusnet unlimited fibre from O2 ADSL2+ since this May!!!