I'm using a 15 yr. old ACER scanner on Win. h'eight by switching to VueScan. Trouble was, when I found a driver it upgraded to the latest VueScan version, and stamped a watermark over everything, 'cos it was the free version.
I'd previously used an older free version on my last computer, which only put the watermark on the bottom of the page, which I could live with -I had to spend money to remove it, i.e. I paid for the Professional Version. Like it.
( Why do THEY have to keep changing everything ? I know, a common cry )