Is my Pc Safe?

I use windows fire wall and have been told that my netgear from sky broadband also has a built in firewall
I use AVG free for virus protection
and every 2 or 3 days use windows free onecare online registry cleaner and virus ,spyware,malware,ect remover

I have been looking for a free Registry Cleaner but as like most of them they are all decieving, they tell you free then want you to buy it to fix the problems that it found for free, my computer is acting slow and sluggish,

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.