Here are your options:
1. Go to Start > Type cmd
1a. Type ipconfig/release (you will be disconnected don't worry)
1b. Type ipconfig/renew (wait for few minutes and your internet connection will be back)
2. Do a factory reset for your PC (reformat)
3. Call your ISP for them to check if X-trap had been filtered/blocked in their system.
Ciao!