Having the same issue along with the fax not working.  Even under the advanced settings, an error pops up stating that it's not possible to enable the fax to pc setting and that it needs to be enabled on the device.  There is no setting for that on the device.

This started after the recent windows update.  

Same problem. And I too suspect the recent update. Wouldn't be the first time Microsoft messed up my printer. Any tips before I start the hassle of reinstalling? I hear that might not work anyway.

I tried reinstalling, and it didn't do any good.  I suspect a firmware update might be needed..?

I have tried all the different drivers and done pretty much everything.  dell will tell you to pay them a fee to help with the issue but because it's not "compatible" with windows 10, there is nothing they can do, even if you pay...

purchased a dell e515dw because it was on sale and i really like the features of scanning/faxing to pc and the e515dw does NOT print faxes to pc.  

Too bad to lose that functionality...guess it's back to HP!

Hello folks. I have the same issue and it's rather upsetting that his new windows 10 update  made this happen. I'm not able to use  my Scan assistant but, printing is no problem. Why not offer a Scan Assistant 1.04.44 UPDATE to accommodate those that have this issue instead of purchasing a brand new model? So, what is everyone doing for scanning? Any cures you can share? Thanks so much.

Unfortunately there is no fix.  I purchased a new model, just like dell wanted me to do, e515dw but that machine does not have the fax to pc feature.

I found a solution to use the scan.
It is necessary to use the application "Scanner" on Windows 10 it works perfectly

and my next printer will not be a Dell

Yes, solved by going to Microsoft Store and "getting" the scanner app there. Can't scan using printer controls anymore, do it from PC, but worked great.