I haven't seen the fake virus and redirects in years.
Been using either Adblock Plus or Ublock Origin as an add on. Have used Adblock Plus for the last 8 years or so, on all sorts of platforms. Started switching to Ublock Origin because the program is a bit more selective about what is blocks and has a lighter memory footprint.(Note: You will have to use the unblock function for various advertiser supported websites. It isn't difficult.)
Bit Defender Free is a good Antivirus for Windows 7, 8.1 or 10
Or you can run on the native Windows Defender for Win 8 and above PS's.
AVG free still works on old slow Vista and XP machines, 32 bit or 64 bit. You can strip out all the extras.