Method1: regedit

HINT: using chntpw can get you rid of rebooting into Linux again (see below)

System time - ArchWiki

Method2: chntpw

1. mount Windows’s System Drive (often C: drive ) (we call it WIN)
2. cd WIN/Windows/System32/config
3. chntpw -e SYSTEM
4. Inside the chntpw environment, run as followings NOET: Instead of CurrentControlSet, you may see  ControlSet00*X*  like ControlSet001 **(check using ls):
   • cd CurrentControlSet\Control\TimeZoneInformation
   • nv 4 RealTimeIsUniversal
   • ed RealTimeIsUniversal
   • q