It's like a cancer that won't go away...

So, a few weeks or a couple of months ago...I think it was actually just last month or so, I was browsing the internet (well, I actually was pretty sure of where I wanted to be, I thinkl), when I got this pop up saying that  my computer was infected with viruses. I know those are scams, so I think I tried to click off of it or get rid of it, but I must have done something wrong (I think), because the next thing I know my computer was taken over by a horrible malware/virus thing called Vista Guardian! Well, it was horrible. It blocked me from getting online in normal mode at first, and told me I had viruses in a bunch of places that should have been fairly safe, and wanted me to pay to 'get rid of them'. Then before I knew it, I couldn't use my computer's actual virus protection program, and when I went into the firewall, this horrible virus had taken it over! Well, in safe mode, I tried to get rid of it, and then when I tried to go into normal mode, I ended up with a blank blue screen, except for the virus. Back in safe mode (with networking of course), I managed to get some help online to 'get rid of it', but it's like a cancer! You know how you can cut it out, but it might not be fully gone, or it might still be there? Well, when I went back into my computer's normal mode, the virus didn't pop up, but I still had a blue screen. I went back into safe mode and did a restore, and finally the blue screen is gone.

Since then though, I've had my computer find a virus that, judging by the name, is the same virus that infected my computer. However, even after it was quarintined, and maybe it's unrelated, when I try to shut doown my computer, the screen blinks like a program's still trying to run or something, and occasionally when browsing the internet (just happened here on this site, actually), I get this url that has a bunch of numbers on it (and if anyone knows what the exact url is, please let me know so I can block it). I'm kind of scared because I tried to get the url to show up so I could copy and paste it, and I ended up going to the site of the url or something, which pretty much said there was nothing there, but not in the valid error type of way, and I'm worried that I put the virus in my computer again just now...

Anyway, it's some scarey stuff. I really don't wanna go through what I went through before, but I suppose whatever happens happens.