A few days ago while on website looking at info about fixing crawlspace posts and piers (fun stuff) Avast supposedly blocked a virus. CPU usage went way up for quite awhile so I rebooted computer. After the reboot, I noticed that I was signed out of my usual online accounts such as Gmail, Hulu, etc. I also noticed random spikes in CPU usage that were abnormal to my computer. Also some problems with Internet Explorer and strange activity from powershell. I ran a deep scan with Avast with no results, then a boot-time scan also with no results. I then ran Spybot S&D with no results. I checked my Windows internet security and noticed it was set to custom (which I didn't do). I changed it back to the default moderate protection. I also downloaded Malwarebytes and ran a scan with no results. I noticed after the CPU usage went back up that my security settings had been changed back to custom. Malwarebytes also began blocking constant malicious websites often named fff5ee.com in the process c:Windows\SysWOW64\dllhost.exe. Checked the task manager and 6-10 processes of dllhost.exe Com processes originate from the same file. These are the com processes that seem to build up and slow down the computer and are being blocked by Malwarebytes. The severity comes and goes and isn't constant since I've been resetting my Windows internet security and ending the com processes. I tried to eradicate the virus with a process I found online at Malware Tips.com which involved running Kapersky TDSSKiller, RKill, Malwarebytes, Hitman Pro, Rogue Killer, Emsisoft, and AdwCleaner. Hitman Pro identified some malware and I removed it. I wasn't comfortable deleting some files identified by Rogue Killer and AdwCleaner as being possibly malicious since they were in the registry without guidance from someone with more knowledge than myself. Computer ran excellent for almost a day then suddenly all of the same symptoms returned. Is my computer infected with Poweliks?
Please help and thank you for your time.