How to remove a VOIP virus?

[John M]

I have problems with Denial of Service - My software phone will not make the phone calls. The service is unavailable.

The operator has no problems, because I have tried different VOIP companies, and I have tried different ISP's.

I have also tried different VOIP softwares.

We have this problem in my company today - the computers must have been infected by a virus that mess up our VOIP so we can't make the phone calls.

How can we solve this problem?

[Chirshbroad]

You need to restore the machine from last good backup.