I previously used Audacity 2.0.5 with no problem on Win10 for at least 1 week…until yesterday when I changed my audio device settings to record the audio portion of a video stream. The recording was successful, and everything still worked, until after my laptop hibernated and reawakened, or something that I don’t really know happened…then I started getting the “no audio devices found - PortAudio” error message.
Downloaded & ran v2.1.3alpha (May 10 2016 r1135) and problem went away.
Acer Aspire V5-471
Windows 10 x64: v10.0.10586 build 10586
Intel Core i3-2367M
Realtek High Definition Audio, driver: Realtek Semiconductor v22.214.171.12435-6/16/2015
USB 2.0 High Speed True HD Audio, driver: C-Media Inc v126.96.36.199-12/19/2013 (Diamond Multimedia XS71HDU 24b/96KHz USB ADC/DAC)