PPTBC.exe is a file in my Anti virus software Protector Plus 2008. It is a legitimate program required at start up and is associated with system tray access.
Then it is okay.
You may want to look at blackviper.com and maybe turn off some of the services that are not needed using this guide:
It will help reduce some of the possible un-needed services, save some computer resources and to a certain degree enhance security.
Ports and services guide from MS for a reference is found here:
It will give some sort of guide.