I have same issues on an Dell Lattitude E6500 with Windows 10, and BCD396XT, BCD436HP... I just do workarounds of rescans and switch USB ports etc... Almost as weird as the issues with Win92 and my PRO-92's where reading the scanners works but can not write to them lol (Thinking I need the mono adapter to write data)... Also noted that if you do NOT have the port speed settings matching on the BCD396XT, the puter, and ProScan, your going to have slow as heck communications. Figured that out experimenting with FreeSCAN and ProScan to see if I could figure out why it was taking over 10 minutes to do a DB load etc on the scanner.