You most likely have the Blaster Worm.
Follow this to get rid of Blaster:
http://www3.telus.net/dandemar/blaster.htm

Signature
Michael Solomon MS-MVP
Windows Shell/User
Backup is a PC User's Best Friend
DTS-L.Org: http://www.dts-l.org/
> When I log on my computer tells me that my connection will be terminated
> in
> a certain time period(normally 1 minute)then it starts to count down .
> Please help,
> Kevin Vickers.