Just a heads up... in the "for what it's worth" department.....
I have a Dell Inspiron with factory card. I've had the laptop for over 6 years and have tried several times to get it to run Music Creator successfully. It never has. Under any of the driver modes.
I have to use the external interface/sound card with it. Your's may be similar.
Music Creator 6 is the latest version and is both W7/32 and W7/64 compatible. So that should not be the issue. The sound card in the laptop is not designed to work well with Cake products and that may be causing the issue.
After running the Wave Profiler for MME, be sure to select the default sound card as audio in and out. It should work OK with audio..... midi and soft synths might be a totally different issue however.
The best option, as Beagle pointed out, is, and especially if you are at least halfway serious about recording music in an efficient manner, would be to purchase a USB audio and midi interface. It is an external sound card that IS designed to work well with MC6 using ASIO (the best) audio driver.
keep us posted how it goes.