How can I fix my laptop?

Ok this is about the sixth time I have posted some variant of the same question and no one has given me a helpful answer, not for lack of trying. My laptop can no longer connect to the internet.
The laptop is an Inspiron 1525 running windows Vista home basic. I thought it might be a network problem but I don’t think that’s the case. I was infected with system security 2009 about 3 weeks ago BUT I managed to get the virus out. I ran safe mode and used some anti malware and a registry cleaner to get rid of the virus. HERE is the real problem though. I can’t get access to my network any more. The laptop gets it’s internet through a wired connection from and older desktop running xp but that’s not the problem. It functioned just fine before I pulled out the virus I even had internet access while trying to remove the virus in safe mode because I had to download some new programs using it. I never could get at files on the laptop from the desk top but oh well no biggie.
But now It can’t get internet service period. I can actually connect to the network but the tool tip on my task bar says "connected to : Unidentified network
Access : local only" same thing if I try to connect to a wireless one from one of my neighbors I get the connection but still have limited or no connectivity so no internet. Anyone have an idea how i can remedy this?? I will be so grateful because at the moment my laptop is little more than a paper weight. Please read the whole story so you actually answer this question to the best of your ability thanks in advance. I hope.

No more network access?

I cant get my laptop to connect to the internet. I use an inspiron 1525 that gets it’s connection through a wire from another computer on the network. It seems to connect but when it does it says "connected to: Unidentified network limited or no connectivity".
I tried with all the anti malware and firewalls off still nothing. Recently I got infected with system security 2009 BUT I got it out ran safe mode and used a registry cleaner and anti malware to clean it up. That whole time I was in safe mode I had net access but once I restarted the comp after the changes I could no longer connect to my network successfully. Please help me!! how do I fix this Problem????