Hi Oscar Bravo,
Sounds like a hosts file problem. Please download 'Hijack This!' from
here, unzip, and place it in it’s own folder, (not in the temp folder) doubleclick HijackThis.exe, and hit "Scan". When the scan is finished, click "Save Log", and copy and paste it in a reply.
This will give me a rundown of what’s going on in your PC.
Don’t fix anything yourself yet, as a lot of the stuff on that list will be harmless or required.
Cheers
Liam