All my browsers wont download anything, says EVERYTHING is a virus?

I had a recent ransom virus, fixed it, but either it or the antivirus (had to use many) turned some things off or rearagnged) turned everything back on like the firewall. But everytime i try to download in Chrome, IE, Firefox, Comodo, it ALL says "Download failed, virus scan failed. So the security center is overidding downlods but i checked the internet options and made sure Downloads was enabled- It is enabled. It doesn't mater what website I go to ir what type of file I try to download, it won't- even things I've downloaded before, I turned off my virus protector, supposedly turned off the firewall,( i hit the turn off button) I deleted (deleted from comp) the main virus protector that was protecting my system in the security center- Comodo Internet Security(although it still says it's protecting it. Before i deleted it, there was NOTHING in the program blocking the download feature that i could see. So after turning off the firewall It should have not given me a security warning, but Windows still does. I even shut off the security center service, and still I got download failure due to a bogus virus scan. I beleve the error is generated from Windows Security center and not Comodo or any other virus scan. I dont have any other active virus scanner on my comp.