I'm trying to post-date my Windows 10 system by one year. I go into the Windows menu to change date and time. I press 'Change', it opens a window, I choose 2020, I press 'Change', then the clock changes to 2020 – and then it reverts to 2019 less than 30 seconds later. The system has no internet or network access, and all visible options in the window are disabled.
- “Set time automatically” is OFF
- “Set time zone automatically” is OFF
- “Adjust for daylight savings time” is OFF
How can I post-date my system clock by 1 year? Is some other piece of software altering my clock maybe, or have I encountered a flaw in Windows?
This Windows 10 system is running as a virtual machine in VirtualBox.