Detach VHD when done?

Quick question about the Windows 7 system image backup:

If I attach the image as a virtual hard disk (VHD) to extract a few files, when I am done, is the best practice to detach the VHD? Or is it better to leave it attached for recovering individual files in the future?

Detach it. That way there is no risk of something accidentally getting deleted or corrupted.

Excellent - thank you! :)