Please Help With My Wireless

Hi guys ummm I am quite desperate atm and i really need some help with this >.< ok umm my laptop is a Fujitsu E8210 and its wireless card is Intel (R) Pro/Wireless 3945ABG and whats wrong is that last night i installed Virtua Tennis 2009 and yeah it installed all this crap onto it and i dunno if it was the game or something but the installers looked dodgy. Ever since the installation i can't access internet. it says my driver is working fine and ladi ladi da but like i cant open my antivirus (bit defender) cant open IE8 and safari wont even work and msn freezes if i attempt to sign in... this is my uni laptop and i got 3 assignments due T.T i already deleted the game and its files... but you cant uninstall it cause its not even on the list... all it did was unpack the files and you press the exe and voila u can play. The internet + msn works fine when its running in safe mode so i dont know whats screwing up my internet >< and it doesnt even work when i use a cable... and like when i flick the wireless switch u can hear the sound of a a device being pluged in and out.. so please help guys >.< ty a lot!

ps: i forgot to tell you guys that i looked for sus programs like malware and stuff and i found this free-download.net toolbar thingy so i delete the program and it worked fine (the internet) afterwards last night but this morning when i opened it back it went back to its oldself of not working even when this program isnt dere anymore

nope cant system restore.. there is no system restore point >.< and like i said this game techinically wasnt restroed.. it just edited my registry and unpacked it self and u can play the game

ok trying that but yeah the virus thing didnt detect anything sigh.. >>< got 3 assingments due tommorow and now my laptop screws up ahhh

its a 32 thx and yeah all the scans show nothing =[