How to solve "the parameter is incorrect" error copying photos to Windows?

I want to copy my photos off my iPhone 6 running iOS 8 to my Windows 8.1 PC. I've been trying by connecting it to the PC. The iPhone is detected fine, and I can browse to the DCIM folder. However no matter how I try to copy it gets a few files in and then gives me an error "The parameter is incorrect." That's all it says.

So I've also tried using Windows import, right clicking on the iPhone and clicking Import photos and videos and using that method I get errors complaining of duplicate filenames, after a couple of which that half crashes leaving a dialog you can't kill.

So how are people copying photos off of iPhone?

Ideally I don't want to install some third party app, or go to iCloud and manually select over 10,000 photos to download. Browsing the internet seems to suggest this error has existed since at least iOS 4, so what gives, is there a fix or does apple not care?