Today I got sent a virus with an email. My Norton Antivirus trapped it OK, and quarantined it. I then deleted it from quarantine. I also updated my virus definitions and ran a full system scan - NAV says my computer is clean. However ever since the virus, my modem has stopped making dial-up noises. It connects OK, and my dial-up number is correct (I've checked) but the modem doesn't make the usual tones when it's dialling - it's absolutely silent. I've checked the volume setting for the modem, and it's exactly the same as usual - around the middle of the scale. I suppose it's not a major problem, but can anyone explain and/or solve this for me, please?
I can only assume that a malicious dialer installed.
so no one would notice it's devious redirection of your internet connection, it turns off the modem sound. Removal of the dialer is successfully achieved using sutable anti malware/AV (which you may have already managed to achieve), but the registry change to silence the modem remains.
Perhaps uninstall the modem drivers, and let windows auto detect the modem and re-install.
Thanks - I had my suspicions about exactly the same idea (that something had taken over my dialler and suppressed the sound so I wouldn't notice). So I contacted my ISP's technical support line about it (in India of course!). They suggested that they should give me a new access number, which they duly did. I've created a new connection for this number, but it hasn't made any difference to the silent modem. If I can see the correct dial-up number for my ISP in my default dial-up networking account, do you reckon I can be sure that that's the number being dialled? Or is it possible for a different number to be dialled covertly? Thanks again for your help.