Sleep mode broken (Win 10 Pro x64)

In December I upgraded a desktop (Intel i7-3770K 16Gb/Gigabyte Technology &SSD) from Win 7 Pro to Win 10 Pro, but since 12 January the computer will not wake from sleep mode (power button needed to reboot).

There were no problems with sleep mode under Win 7; there were 2 Windows updates on 12 January: Windows Defender Antivirus KB2267602 & Microsoft.YourPhone

The following steps have offered no improvement (Win 10 v 1909 18363.592):

i) Advanced Power Settings: PCI Express - change from 'Moderate Power Savings' to 'Off''
ii) CMD (admin): powercfg -h off
iii) Uninstalled Phone App: PowerShell (admin) Get-AppxPackage *Microsoft.YourPhone* -AllUsers | Remove-AppxPackage
iv) Windows Memory Diagnostic Tool run - No errors detected
v) Windows drivers appear up to date

Any suggestions for a remedy would be much appreciated.

swarfega said:

Powecfg -h off would disable hibernate and sleep. Have you tried powercfg -h on?

Many thanks - will do and monitor.