Many users running modern Windows builds (post-2021) found success using these specific legacy packages:
The standard VSSP35851 driver (2021) requires users to manually type their PIN on the physical printer's tiny keypad to release a confidential print job. This is slow, unhygienic (touching public surfaces), and prone to "fat-finger" errors. vssp35851 software 2021 download
Good luck, and happy computing!