For starters, I am in the Windows 10 Insider program and this *might* be the cause since I get "fast track" (more or less beta) updates of the operating system from time to time.

I have had this problem on both of these builds:

Windows 10 Pro Insider Preview / Version 1511 (10.0.14251) / Build 14251.rs1_release.160124-1059

Windows 10 Pro Insider Preview / Version 1511 (10.0.14257) / Build 14257.rs1_release.160131-1800

Every attempt to rip to WMA or convert from any format to WAM results in clEncoder::BeginConversion. Full error:

Error ripping to Windows Media Audio 10, 'Track 1' to 'C:\Users\X\Music\la la la\Something Here - 01 - Real.wma'
Error Starting WMA Writing (unknown reason). [clEncoder::BeginConversion]
I'm running (I think) the newest version of dbPowerAmp (15.03) and the newest WMA codec from Codec Central.

Aside from leaving the Windows Insider fast track... are there any other suggestions, solutions or workarounds?

I will keep looking but I couldn't find anything in the forums specific to Window 10 or Insider builds.

Thank you!!