Hmm...
How are you starting and stopping the MetaStock application? No matter what I do, I cannot get it to abandon MSWIN.exe... even if you are running the DDE client and then start it (or vice versa). That seems weird to me too. Assume that you want it to run- still, it shouldn't be consuming all of your resources. Make sure you are not trying to update too many files. You might want to check your real time configuration. If that doesn't shed light on it, you may need to call or email support.
Check your Realtime Configuration options
OPTIONS | REALTIME | CONFIGURE SERVER; then, check SERVER OPTIONS and FILE UPDATES
Traders' Consortium