I use a CMS 50DP device (Veridian's branding) with Windows 10 Pro (64-bit, release 1909). The ONLY version of SpO2 software that has worked for me, is SpO2 version 1.2. Nothing newer. :-( I've tried all sorts of versions of SpO2 2.x, 3.x, various Silicon Labs drivers, etc. And with OSCAR, I cannot "...