I had Windows 7 and 5D Embroidery from Husqvarna Viking. When I updated yesterday to Windows 10, my dongle did not work. I contacted Embroidery Software Support 615-280-3510 at Pfaff, and was given the following directions:
1. Remove the dongle from your computer.
2. Go to www.premierplusembroidery.com
3. Check the "Downloads" link from the menu bar and click the "Premier+Software Downloads" link in the drop down list.
4. Click the "Premier+Embroidery System Download Portal" link.
5. Log into your account.
6. On the Software Download page, scroll to find Premier+Dongle Drivers and click HASPUserSetup_7_41.exe. to save to computer.
7. Right click on the HASPUserSetup_7_41.exe file you just downloaded and select Run as Administrator.
8. After the installation is complete attach the dongle to the computer. The dongle will install device drivers and light up.
This fix worked for me. I can now use my 5D embroidery system. I was told that even though I don't have the Premier Embroidery System, this was the way to get my dongle to work.
I hope this helps those of you who couldn't get 4D, 5D, or 6D dongle to work in Windows 10.
Happy Embroidery!