I had problems scanning dia film with Silverfast and plustek opticfilm 8200i. I just get about half the image and than just color bars. I'm using Windows 10 and I have a Samsung C460W printer/scanner connected via USB
After a lot of trouble shooting I came to the conclusion that there where a conflict between the Plustek Opticfilm 8200i negative scanner and the Samsung C460W printer driver. When I killed the CDAServer (CDASrv.exe) process the scanner just started working as normal. CDAServer is a part of "Samsung Easy Printer Manager" and does not need to run all the time so I disables it on startup.