Uninstalled Also Installed Tunup Utilities Reboot

Im using a HP Pavilion dv9700 notebook with vista 32bit OS installed. Note that when i did the following i was not connected to the internet: The problem only recently occured after i attempted ot remove Norton security centre from my computer. That uninstalled fine. I also installed tunup utilities 2009 and did a reboot. On reboot the Windows loading bar froze. This kept happening every time a did a restart. So i decided to do a system restore to resolve that problem. That resolved the freezing issue and i figured that i would have to remove internet security again and so tried to unistall it again only for it to say "The system cannot find the path specified." So Norton is now corrupt and i cant run it or uninstall it. But i decided to run registry scans and cleaned up the computer with Tuneup.

After i took the laptop back to where i can use the internet. I plugged in the Lan cable and tried to run firefox but it didnt connect. The only connection i can get is local only access. I live in University halls and i should be on the internet when i plug in the LAN cable. I have since tried a system restore to restore back to a couple of days ago but its no use. I still have the same problem. No internet and no chance of uninstalling Internet security for good. As my LAN network driver is Nvidia netwroking controller I can only assume that its the nvidia controller that is the problem. Even though windows claims there is nothing wrong with it. I have tried uninstalling the driver, but when i confirm it just closes the dialoge box and doesnt uninstall it at all. I cant rollback the driver as its not an option and although i downloaded an older version of the driver and installed it (it said that it installed?), it has no overrun the more up to date driver. I have been trying to fix this for around 6 hours now & its vital that i get back online with the computer as i have assignments due in for tuesday. (im using some one elses computer at the moment)