Need your urgent help, Thank you very much!

After I deleted some spyware/adware (SahAgent, Wupdater)
on hard disk and registry, the networking functions seem
not working.

After I restarted, the computer is very busy. From the
Task Manager and Event Viewer, I find that the SSDP
Discovery Service continues to start and stop.
So I disabled it.

Now, after I restart again, from the Event Viewer, the
system errors and warning are as follows:
1. Error: NetBT/4311 (Source/Event ID), "Initilization
failed because the driver device could not created".
2. Warning: DHCP/1006, "Your computer was unable to
automatically configure the IP parameters for the network
card with the network address X. The following error
occurred during configuration:The requested service
provier could not be loaded or initialized".
3. Error: Service Control Manager/ 7023, IPSEC service
cannot be started successfully.
4. Error: RemoteAccess/20071, the file rastls.dll cannot
be initailized correcly.
5. Error: RemoteAccess/20151, the file rasppp.dll cannot
be initailized correcly.
6. Error: RasMan/20063, because PPP failed (4 and 5).
7. Error: Service Control Manager/7023, Remote Access
Connection Manager failed: access denied.
8. Error: Service Control Manager/20035, Remote Access
Connection Manager failed: could not create buffer.

I tried to reinstall XP home edition (upgrade). No effect.

I need your help so bad. I cannot get access to the Web
using that labtop.

After the bad event, I cannot get an IP from DHCP. Now,
the IP I have is an autoconfigured IP, without Default
Gateway.