It's a clean reinstall only in the sense you are returning it to factory condition, with all of the corrupting bloatware that most tech enthusiasts would not allow.
A real clean install would be finding a clean-copy of your version of Windows 7 and installing it using the Product Key stickered to your machine.
You won't have any of the useless Acer bloatware, either. Just losing the network connection manager and using Windows 7 superior manager will shave 20-30 seconds off your bootup time.
Any drivers or apps (cam, card reader, fingerprint, etc) you do need can be found on the Suport Downloads webpage for your model or an apps disk if it was supplied.