Hi there,
I would recommend you do something known as "flushing your dns". To do this simply -
1. Press Start or the Windows icon via your desktop taskpane
2. Search for "cmd"
3. Right click the "cmd" icon and select "Run as Administrator"
4. Within cmd - Type this command: "ipconfig /flushdns" (Without any quotation " " marks)
5. Wait for this to complete.
Regarding your World of Trucks issue, I would suggest you sign out of it completely - go to your edit profile and remove all email / password login information and try again.
This should hopefully work.