I downloaded Windows 10, and now my scanner does not work.
All of our scanners with native USB just plug and play with Windows 10. For older models (i.e. “XT” or “X” models) that have a serial connection, older USB-1 cables will not work, as Prolific changed their drivers several years ago to only work with their newer chipset that has anti-counterfeit features. At that time, we changed the chipset in our USB-1 cables. So, if you have an older USB-1 cable it won’t work with Windows 10 (or really w/8 using current drivers). Newer (last couple of years) cables will work.