Welcome to Justanswer.com, my name is ***** ***** I will do my best to assist you.
Your question seems to be missing some important details.
What specifically are you trying to use that isnt compatible with windows 7.
A printer, a camera, a scanner, something else?
Also, whats the full name brand and model of the device you are trying to use.
Thank you for your response,
Dustin S.Senior Technician and Network Switching Systems Operator / Maintainer.