So make sure you’re logged in as a Local Administrator.
This is just a quick post to share a problem I had while trying to update the firmware on an MK808B recently, and the solution I came up with.
The problem was trivial, but none of the suggested solutions that I found online were appropriate, so I am sharing what happened here to save other people the same issue.
Unfortunately, there is no easy way to find it out.
So it’s better to disable the security software completely and then try to install the software.
Observe: From the log it looks like the troublesome registry is HKLM\SOFTWARE\Microsoft\Windows NT\Current Version\Winlogon\Notify\igfxcui. You can use Process Monitor to watch what regedit is trying to delete and see the error message that is returned.
I looked into that reg and its permission for Administrator is Full Control and Read. I assume you're running regedit elevated (or as administrator with UAC off), as well.
Again, do remember to re-enable your security software, once your installation completes successfully.
There are some common locations which sometimes we are denied permissions.
If you need further help, please post in our Windows forums. Shyam aka “Captain Jack” is a Microsoft MVP alumnus and a Windows Enthusiast with an interest in Advanced Windows troubleshooting.
Suggestions made and opinions expressed by him here are his personal one's and not of his current employers.
If it does not help, you may next try to disable your security software – because this software can be very tricky sometimes.