shutdown will take very long time after installing wireless USB driver?

Dear all
The first time shutdown operation will take much time (almost 10 minutes), after installing a wireless USB driver.
But I hadn’t plugged USB wireless device into my PC, So i think driver hadn’t to be loaded.
I use windbg to list all process, I found no special process exist other than Windows basic process.

I have no idea how to do. Could anyone help me?

thank you very much.