Unable to log in to websites

[AMonty20]

Hello,
For the past few days i have not been able to log in to various website e.g Youtube on the internet. I type in my username and password and press enter, the website refreshes yet i have not loged in.

I think there may be a problem with the sending/recieving of cookies as when i go to website, the website says that my cookies need to be changed.

I went on to the firefox prefrences to see if my cookie settings had change yet they were are all set to accept all cookies. I also used google crome, safari, Opera and still had the same problem

Any suggestions?
Thanks
Alex

 

[tompatrick]

try reset the dns setting through System Preferences.

 

[charliekqpr]

try the system preferences thing and if not then clikc sign in because enter sometimes is linked to something else in this case f5