Full disclosure, this thread was originally posted to this location and moved to this forum: http://www.bleepingcomputer.com/forums/t/525140/formerly-infected-vista-comp;-no-dhcp-address/
I have a Vista Home SP2 64bit computer that had spyware issues. I ran all common and some not so common tools to get to where nothing is being detected right now, but my wired LAN connection won't get a DHCP IP address. If I assign a static address it works fine. If I install a wireless USB adapter, it get a DHCP address just fine. Before you ask, I did install the Vista hotfix for DHCP not working with some routers. If ran into this before on other computer and just ended up reloading Windows but would like to figure it out with your help.
Tools I've ran, some more than once (not listed in order ran): Malwarebytes, Hijackthis, AdwCleaner, ComboFix(before I saw posting instructions), CCcleaner, Farbar SS, Junkware Removal Tool, MiniToolBox, rkill, RogueKiller, TDSSKiller, and others that I can't remember. If I were to run them now, I'm fairly certain they would come up clean, but am willing to do whatever and learn! I've update the wired LAN driver. Windows reports the connection as "unidentified network" and it keeps setting the network type to public, and turning off network discovery. If I set it a private network and enable network discovery, it still shows unidentified network. After restarting, it goes back to public with network discovery turned off. When I plug in a network cable, it never asks what type of network is attached. I also ran these commands in a batch file I found on the forums:
attrib -h -s -r hosts
echo 127.0.0.1 localhost>HOSTS
attrib +r +h +s hosts
netsh winsock reset all
netsh int ip reset all
echo Script finished.
Please see attached files posted hopefully as instructed. Thanks in advance!
**Update: While working on another project (setting up a wifi router), the router was temporarily plugged into the same network as my existing network and the computer obtained a DHCP IP address right away from that router. So I guess I'm at a point where either my original router is not doling out IP's right, or even with the hotfix installed, Vista still isn't compatible with my router's DHCP? I physically took the computer to a different location and it worked fine on DHCP there also. I guess there is either a compatibility issue at the first site or the router's DHCP server is having problems. Unless someone sees something in the attached logs, I guess this thread can be closed or deleted.**
Edited by cjfling, 21 February 2014 - 09:37 PM.