Shoutbox

My laptop's been acting up since Monday, it took ages to send messages to the contacts I was talking to on WLM, but I didn't think anything of it. Today I turned the laptop on, normal vista start-up. I click on my name and log in, and then the task bar is grey, and is on the Windows Classic theme, and I tried to change it to.. aero black (I think thats what it is..) and it says it can't because it's corrupt or something. I look at the icon in the corner of my taskbar to see if there's any internet connection. It turns out that there isn't, so I double clicked on the icon for the router signal and then it loaded the window and stuff, BUT- it turns out it can't detect the fucking router, or any others for that matter.. so I couldn't use the internet to help me find out whats wrong with it earlier on.. I basically have NO idea how to fix it. I wanted to see if i could reset it back to when it wasn't acting up, and it can't for some reason...soo.. can anybody help me with this? & if it's any help, the laptop's a vista vostro 1000 that I got about 2 months ago because I spilt a bottle of pepsi over the keyboard of my old laptop.. =P I can't think of anything new that's been  downloaded recently what could have made it run as slow as it was. Yesterday I ran a full scan with AVG and it was fine. I've had to resort to using ebuddy to talk to people. I really need help with this though, so.. help plz? =P