Bizarre Problem

OK, Here is a bizarre problem that I have never
encountered before. My Win 98 PC is connected via LAN
connection i am able to ping the IP of the PC,I am also
able to transfer files between PC's sitting on the same
side of my router, I am able to ping the DNS from the PC,
I am not able to connect to the Internet, mail, FTP,etc....
when running netstat command I have no active processes
running, The only thing that I can see that doesn't look
right is, when running ipconfig, IP routing is not
enabled, But I have not been able to figure out how to
enable it...This PC was working fine for at least a year,
one day it was powered up and this started, and hasn't
been able to connect to the internet since.....
Any Help is greatily appreciated...

THANKS,
DAVE