Well, it is a challenge that will require more investment in time finding a solution. What the heck, why not? I did open Device Manager and there are some differences. For example, XP shows "Legacy Video Capture Device Properties, WDM Video For Windows Capture Driver (Win 32)". Win 7 does not. However, for Roxio Capture USB, the drivers are the same. Ver. 5.2009.416.0 with a date of 4/16/2009. Win 7 also shows USB 2861 Device with a Microsoft driver of 6.1.7601.18208, dated 7/12/2013. Presumably, the USB 2861 refers to the Roxio Capture USB device. I wonder if this is the source of the problem? That is, the Roxio driver Ver. 5.2009.416.0 being in conflict with the Microsoft driver 6.1.7601.18208?
I don't know if this information is helpful or points you in some logical direction, but there it is. To your apparent question about the installation of Creator on each drive, the answer is yes, each drive has Creator 2011 installed. And yes, the proble occurs only on Win 7.