I never use the Search box on the forum page header. Maybe it's improved, but in the past it's been unreliable. Google works a lot better. Type in "site:forum.cakewalk.com C++ runtime". You should get lots of results, because it's a common query.
SONAR and most of your plugins rely on the Microsoft C++ runtime library. In fact, 90% of the code you're executing is probably running within that library. Consequently, it's where a programming bug is most likely to show itself.
Sometimes it comes down to having the wrong version of the library installed, but far more likely is that you've found a bug in a third-party plugin. It's often an obscure and system-dependent bug, e.g. something that only occurs with your particular video adapter. If you are able to identify the offending plugin, the vendor would probably like to know about it.
Lately, there have been a few plugins that fail under XP specifically. It's just because most developers have stopped testing under XP and therefore never knew about it.