Has it ever worked? It's important to know, because if it has worked in the past, but slowly degraded, it's probably a malware issue. If it never worked to begin with, then it's likely something else.
And I know Vista is everyone's favorite whipping boy, but it was nowhere near THAT bad on it's own. It wasn't really that bad a product anyway. It was just way overpromised, way overdue, and incredibly underwhelming when it finally did arrive. It was a marketing blunder more than a technical one, not that many people seem to have the skill necessary to separate the two.
We bought a Dell Inspiron 530 about 1 1/2 years ago with Windows Vista loaded. We have a DSL internet service and the signal is split between two PC's off a switch. From Day one, on the new PC we have had an issue where we have to click the "e" 2-10 times before we actually get an internet connection (when it doesn't connect, it just says "connecting" and stays hung up).
From things I read and talking to others, I figured it was the Windows Vista, so I switched to Windows 7 a couple weeks ago. Still happening. So I switched my router to a Wireless N (was a wired switch). Still happening.
Could it be the PC? Any other ideas? This problem has never happened even one time on our other PC.