I couldn’t post on Friday; I haven’t even been able to access this blog until a few minutes ago. The magic that worked was called SUPERantispyware, which I downloaded on a recommendation on Friday. When I'd updated it, I ran a scan that found over 400 tracking cookies and over 100 other threats. These were deleted and the system immediately speeded up. I could turn on my Windows Automatic Update and get the latest updates.
But I still couldn’t contact blogger.com or drop any entrecards. I’ve now updated again and rescanned. More threats were found and dealt with. And lo and behold: here I am. So back to normal tomorrow, I hope.