It sounds like you're executing a file and or registering a COM component and it failed. I need more information:
1. What's throwing the error? Is it wyUpdate? Is it crashing? Or is it showing an error message? What's the full error/or crash report?
2. Are you executing files? Is that causing the error?
3. Are you registering and/or unregistering com components? Is that causing the error?
4. Can you reproduce the error?