Vista stopped dialing internet

I have 2 Vista machines , and one stopped being anle to connect to the
internet yesterday i know its not modem , rouiter or networking as the
other computer works and i have swapped cables.




I also installed Visual Studio ( which is why imn not keen to try a
roll back)


I noticed some hotfies installed on the same day but have removed .
The error it gets is 797 form rasdial cant find modem but i can ping
it.

It only started happening this morning .

Any suggestion appreciated,

Regards,

Ben