Windows Small Business Server 2003 SP1 with Exchange Server 2003 (ver 6.5 [build 7638.2] SP2).
MXTOOLBOX.com reports no blacklist activity;
Does complain about SMTP Banner Check (Reverse DNS doesn't match SMTP Banner) & warns doesn't support TLS, but that's it.
A process running from C:\WINDOWS\Fonts\jacbncud\svchost.exe is using 50% of CPU (XEON X3323 @ 2.50 GHz).
The subfolder "jacbncud" is not visible unless searched for by name in Windows Explorer.
Process Explorer reveals it.
TREND MICRO WFBS 9.0 doesn't react to it, nor does MALWAREBYTES.
But it seems to me that's a queer place for a process to be running from and it's using an awful lot of CPU time.
I'd be grateful for any constructive suggestions short of replacing the OS. (don't have the resources for that right now)