I don't really see anything there which could break your internet connection.

We can try couple of things.
You have restore point from April:
19-04-2012 01:12:13 Scheduled Checkpoint
We could try that and start cleaning all over but before we go there...

You don't have any service pack installed.
Download standalone SP 2 on another computer: http://www.microsoft.com/en-us/downl....aspx?id=16468
Install it on bad computer.
It may fix something.