I'll share my misery to help you if you encounter the same thing.  My Windows 11 machine restarted after an "update" on Monday.  Today, while working on FT8, I noted a very strong interference pattern on the WSJT waterfall, on all bands.  After a couple of hours of frustrating troubleshooting, I isolated the problem to the USB CODEC driver.  It was updated to allow "sound enhancements" for Windows and was turned on.  I turned off the sound enhancements feature, and the issue seems to be resolved.

Andy

Andy McClary  KQ4WWD 583 Concord Court The Villages, FL  32162 (740) 777-0817  [email protected]