|I don't normally post my own software, but in this situation it may be exactly what you need.|
I make a freeware program named XP TCP/IP Repair. I recommend to use this and another program.
Use SuperAntiSpyware (Free Version) to find and remove any leftovers of any infection you had. It will remove everything. Then use XP TCP/IP Repair to repair your Winsock and TCP/IP stack.
SuperAntiSpyware can be downloaded here:
XP TCP/IP Repair can be downloaded here: