On two sites I use where passwords etc are required (bank being one of them),I now get this message: Revocation information for the security certificate for this site is not available. Do you want to proceed? I'm offered 3 options, YES, NO or View Cert. If I proceed with YES I can get a new cert. it seems but I don't know if this is safe or not. There is a security warning. This seems to have started happening since I had a virus attack a couple of days ago which my son managed to quarantine. What should I do experts? Thank you in advance.