Nie mam win8 ,więc zbytnio nie pomoge . Znalazłem instrukcje na fanpage walton primo ale po ang.(mam nadzieje że nie sprawi to kłopotu). Poza tym dużo osób boryka sie z problemem własnie na win8
Disable Driver Signature Enforcement to allow installation of unsigned drivers
1. Open the Charms Bar in Windows 8 and select "Settings"
2. Select "Change PC Settings"
3. Select "General"
4. Scroll to the bottom of the General page and select "Restart Now" under "Advanced Start-Up"
5. Once the PC comes back up, select "Troubleshoot"
6. Select "Advanced Options"
7. Select "Start-Up Settings"
8. Select the Restart button
9. Press either the F7 key or the number 7 key from your computer keyboard.
This disables the Driver Signature Enforcement, which will allow you to install a printer driver. After pressing either key, your computer will reboot.