well,the Event ID: 41 can be from you shutding down wrongly the pc
but can also be from diferent speedstep cpus installed (like dual cores).
You are working in a 64bits environment,
Are the drivers that you installed from the creative titanium sound card the correct one?
In this case for windows 7 X64?
In the page from Creative were you download them was it saying to install
any update from microsfot first or a Service Pack?
Do a research on that area, because i am really sure that if you intalled the correct
driver for you windows and is having problems since you installed the creative sound card so,
creative labs should have there something (probably in FAQs)that you can download
to fix the issue.
Hope that helps.