"About:blank" is not always an easy bit of spyware to clean out. What have you done to clean it up? Have you tried running the clean up tool below?
Have you tried running HijackThis and posting the log at one of the forums listed in the link below?
How to use HijackThis and where to post the log.
If you KNOW that its' now gone, please try running the LSPfix utility from the link below. It might fix the connection issue:
Repairs Winsock 2 settings caused by buggy software or improperly removed internet software:
Hope this helps.
P.C. got bug defaulting page to about blank then crashed my nic. nic says o.k. but gets 169.... ip. Installed another nic same thing getting link ok and other pc on net. ok. seen this happen before ! but do not know how to resolve XP home ed.