S shura Well-known member Joined Feb 2, 2014 Posts 55 Aug 1, 2020 #1 As of today, the system stopped sleeping. Upon checking with powercfg /requests, there was only one item: \Device\HarddiskVolume4\Windows\System32\MoUsoCoreWorker.exe After I set sleep in one minute to manually check what's going on, powercfg /requests reports nothing, but the system does not sleep, just turns the screen off. This is a ~7 year old Dell desktop (win10 Enterprise, upgraded to 2004 build months ago), never had this issue. I'm pretty sure I don't have any viruses, malwarebytes report clean. I ran elevated powercfg /SYSTEMSLEEPDIAGNOSTICS, the report is here: sleepdiag_8.1.2020.html Any suggestions? Thanks!