Audacity is as beag said a simple wave editor, it does not need to use the fancy driver modes, but sort of embeds itself into windows and uses whatever it uses.
Most likely what you are experiencing is that Bose does not heve a very good driver set for the newer computers (64 bit) and all. One thing to consider is that you have had issues from the getgo, and it might be some small misunderstanding on your part, in the setup. I don't mention this to pick on you, but to get you thinking on what it is that you are missing that we can't see.
There seems to be a general struggle with MC5 and for that matter all cakewalk stuff right now with 64 bit. not so much cake itself, but in the plugins and synths. Everyone point you to ASIO, but one thing to consider is that Cake was designed to use WDM as default, and many have found it likes that driver the best. Not all ASIO drivers are equal, as they are third party, where WDM is a windows driver.
Lastly when you upgrade you need to go do a lot of research, Toshiba laptops have a long history of struggling as DAWs. First it had to do with the fact they installed older slower hard drives (4200 rpm) , lately Both Toshiba, and Dell, and even a few more are guilty of placing too many things on one IRQ address, specifically the video drivers. This causes conflicts. I can't say for sure, but it might contribute. Lastly most laptops come today, and desktops for that matter, with far too much crap installed on the drive, and most of this crap is embedded so that it constantly asks for inflrmation causing interrupts in the process.