Trojan that changes your dialer to *.OLD

HI , i have a problam with my XP >
my adsl dialer has been changed to ADSL.OLD and a new dialer was made without user name and password but with a dial number to Over seas… ( 008002232…somthing… )
once i created a new dialer it works fine till the next i restart my machine and then - i get the new dialer again …

what do i do ? and what is it ?

Thank you

gilad

try to do some scanning with avast…

also try some online scanners if necessary…

not forgetting spyware tools too…

http://www.security-ops.tk/

THanks for the advise but none of these things is wokring…
i scanned my pc with AVAST , and scanned it with SPYBOT and ADAWARE … nothing…
everytime i restart - the dialer becomes *.old and a new one with the phone numer 0080… is being created again…

if someone knows something about it - i’d be happy to hear…

gilad

Run I free online virus checking call HouseCall to double check if Avast hasn’t missed a virus.