Sirefef-PL [rtk] infection-redirects and weak certificate errors

First of all, thanks to the folks who volunteer to help the teaming masses, those yearning to be free of malware!

I have encountered Sirefef-PL [rtk] and it has rendered the PC mostly useless; google search results get redireced; and when attempting to access gmail I receive a warning about a weak certificate. The address bar shows https with a red slash through it, and the padlock icon to he left of https has a red ‘X’ through it, and I am unable to access gmail.

Hi you are being assisted by one of my students at GeeksToGo. So I will let you continue there

Ran into trouble with ComboFix, it seemed to run normally to completion, then displayed a log, but when I try to open a browser or any program for that matter, I get a message stating, “Illegal operation has been attempted on a registry key that has been marked for deletion”. Affects all files, whether a simple text file or an executable.

Just reboot again.

The PC seems to function better, am able to access gmail without the certificate error message.

Here are the OTL and ComboFix logs: