Attempted to install driver, now missing two files

I was trying to install a driver for a wireless PCI ethernet card but I got an error asking me for the Win98 installation disk so I downloaded the driver from the internet. After I downloaded the driver I turned on the computer that I've been working on and now it says that its missing vredir.vxd and then dfs.vxd and I didnt even install the driver. It says the windows registry or SYSTEM.INI refers to these device files but they no longer exists. Then after that I get an error in Windows that says it was unable to load the dynamic link libray: msnp32.dll and that some or all the features are not avavliable: Microsoft Network. Once I click ok windows boots normaly and I can use all of its functions (as far as I know of). One anyone know how to get myself out of this terrible mess? Thanks