The previous fix didn't work.
Follow the instructions below. If anything is unclear, just ask first.
Start regedit.
Allow the program to run.
"Registry-editor" will open. On the leftside browse to the key
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\TrustedInstaller
Rightclick on it and select Permissions.
A new window opens, click the button Advanced.
A new window opens, select tab Owner.
Put a checkmark at Replace owner on subcontainers and objects
Select Administrators (...) then click Apply and OK.
In the list "Group or user names" select Administrators (...).
Next, put a checkmark to allow "Full Control" and click OK.
Rightclick the registry-key again, then double-click the value name BlockTimeIncrement.
Are you able to change its value from 384 into 2a30 ?