Had kinda the same issue some days ago. Do you use one of the updated latest build of Windows 10 by any chance? If so then you might encounter some of issues than most encounter with their antivirus. There's all kind of issues between most antivirus and the latest versions of Windows 10.
Like me, most Comodo users probably received a warning message leading to their forum. They mention DDOS and login issue but in my case it was more issues like you.. I had to download the update of Comodo made as fixe and to reinstall it. This fixed my issues. Check if there's a newer version of your antivirus and reinstall it.