I've tried twice to upgrade my machine from 2012R2 to 2016 RTM. Both times it failed with message
0x800F0830 - 0x20003 Windows Server 2016 the installation failed in the SAFE_OS phase with an error during INSTALL_UPDATES operation
I've already tried the those
Use the sfc.exe to find if some errors and then repair missing or corrupted system files.
Run dism.exe /online /cleanup-image /scanhealth and dism.exe /online /cleanup-image /restorehealth.
Can't actually try ( IT department )
- Disable the Anti-virus software from your system if you have any.
What do I miss?