NSLOOKUP works but ping cannot resolve XP
After Avast pulled a bug off a computer, I could not get internet connectivity.
The usual netsh commands didn’t help.
A number of other small tests such as net stop dnscache didn’t help.
LSPFix found something and removed it, but that didn’t help.
In the end, a small freeware utility Winsockfix.exe from http://www.softpedia.com/progDownload/WinSockFix-Download-15337.html did the job 🙂
Afterwards, HitMan Pro found a few bits of bugs left over that SpybotSD, MBAM, and MSSS didn’t notice.