Internet Missing After System Reboot?

with a little internet problem on a Windows 7 professional system.

Essentially, last week after an Update, I could not get back onto my driver (the hard drive is partitioned so I have a section and my other half has another). A system restore to the previous day has allowed me to access the computer again, but the internet is gone.

The OH can use the internet on the same computer (I am on his half now), so there is no fault with the modem, the cable or the internet connection per se. We have tried to restore the internet using various manual methods, but can get no further than the SetUp. At this point we get a message Error 711, and reports that the Remote Access Auto Connection Manager is not responding.

I have tried to fix this today, but cannot get onto the services to fix it - when I click on Services and go to 'run as admin', the message appears "Class not Registered". I have also had this message when trying to connect the internet by writing a manual IP address, and when looking for the IP drivers.

The OH is threatening F*kdisk which would mean I lose everything on the drive, but I do not have another solution.