The only netfilter.sys malware I'm aware of is a browser hijack malware. I don't think removing it should have hosed your networking completely, but browser hijack software has been used to install other nasty things. Maybe your antivirus software found lots of other stuff and damaged something in the process of cleaning up the mess.
I'm not sure what you mean by not having the user name or password to make ethernet connections, but if you are connecting to the internet via wifi, there's often two different wifi configuration programs you can use: one provided by the wifi adapter manufacturer and a generic one that comes with Windows itself. The only thing that comes to mind if you are having trouble after reinstalling the wifi drivers and software is that I've often had issues when my system tried to run both at the same time. Either you use the vendor one or the windows one, but not both at the same time. If one is running, kill the other.
If it is a missing Windows component, then Windows 7 usually can fix that with the troubleshooting wizard. If it can't, it would be difficult to tell what the problem was without significant technical information. Does the WLAN see the correct SSID? Does it actually connect to that SSID? When you ipconfig /all do you see the wireless adapter, and does it show you acquiring IP address information?
WLAN does see correct SSIDs it actually connects but acts like it didn't on the internet icon (no change), whilst it lists the connection to the SSID as EDIT: "
limited access"
ipconfig /all does not show the device, it shows Windows IP Configuration with the host name being the computer identity,
dns:
node type: hybrid
IP routing enabled: no
WINS Proxy Enabled : no
then followed by tunnel adapter
?*15 , 6, 11, 12, 18, 19,13, 14, 16 all with the same settings:
media state: media disconnected
dns suffix:
description: either Microsoft 6to4 Adapter #1-10 or Microsoft Teredo Tunneling Adapter
physical address: 00-00-00-00-00-00-00-E0
DHCP ENabled: No
autoconfiguration enabled: Yes
also several entries of:
Tunnel adapter 6TO4 Adapter/ tunnel adapter reusable Microsoft 6To4 Adapter
same info.
wifi configuration programs, I don't know what those are or where to find them if they are on my system (help here might be what I need), I reinstalled the driver for the two wifi devices I use.