For the last month or so a problem has developed where I am having difficulty accessing secure websites. It is not constant and not always the same sites. All other internet access is fine.
To give an example I can be logging in to my online banking and it will either take an age to login or throws me out usually with a message linked to a timeout. If I get passed the login the same problem can then happen on the next page etc, This can happen on any secure site I am trying to get into but it is not consistent - one day it will work for site A but not for Site B, the next day it can be the other way round.
I realise any number of things may be causing this but has anyone got any ideas what the most likely causes may be.
I am on Windows 7 and mainly use Firefox although the problem seems the same in IE