Issue

Nitro PDF Pro (v10.5.8.44) virtual PDF printer disappeared from the list of installed printers on some Windows 7 Pro PCs. Re-installing it via Nitro PDF Software Support Tools (located in C:\Program Files\Nitro\Pro 10\NitroPDFSupportTools.exe) fails with following error:

Nitro PDF Software Support Tools
Installation of the printer driver failed.

Resolution

I contacted Nitro PDF support regarding this one. Their response was that a recent Windows Update made some changes Print Spooler service which breaks Nitro PDF Creator printer driver. Nitro resolved the issue in version 10.5.9.9. Upgrading Nitro PDF Pro to this version restored the PDF Creator printer on all affected PCs.

October 2016
Windows 7 Pro 64bit
Nitro PDF Pro 10.5.8.44