I know that will sound like a mantra but...switch to Firefox firefox...but if you still want to use IE....😛
I think we have a pattern here...Ok: Its quite possible that your hosts file has been modified. The hosts file is a system level override that can map certain domains to static ips. Hosts file should be located in something like:
C: \WINDOWS\system32\drivers\etc
Open and get rid of all but 127.0.0.1 localhost (edit it in notepad). BUT MAKE A BACKUP BEFORE!!!
Restart and pray... pray