If you can`t download an antispyware software, open an anti virus vendors sites, then try Hosts Xpert – Free hosts file manager for restore Windows HOSTS file.
- Download Hosts Xpert
- Extract to your Desktop.
- Run Hosts Xpert
- Click “Restore MS Hosts File”
- Reboot your PC
After these simple steps you should to get access to all blocked sites, if you still have a problem, then create a free forum account, and create a new topic with your more information about problem.