If Mbam didn't find anything then it is highly unlikely (but not impossible) that your problem is malware-related. It is probably due to some legitimate software that was installed by the DVD in question. It's worth doing a full virus scan of your system in safe mode just to be sure, using whatever anti-virus software you have installed.
After that, go through the list of installed programs and see if anything looks like platinum:
- start menu -> control panel -> add/remove programs
otherwise you could try installing
winpatrol and then go to the list of startup programs and disable (right-click->disable) everything except winpatrol and your antivirus and firewall software. Then reboot and see if the problem has disappeared.
Slainte
midders