]Hi ,
I had the same problem upgrading a 64 bit Win 7, (brand new install), up to Win 10.
Attempt 1 stuck at 99% for 12+ hours.
Attempt 2 stuck at 99% for 13+ hours, (excluding the time it was in sleep mode - from the 29-07 to this morning 03-07)
I have 'SNIPPED' images of the hung install window, all the Task Manager panes and the Internet History from Chrome since the Win 7 OS went live - plus control panel screens showing the computer configuration, System Basics, Device Manager and Action Centre - non of which suggest a problem or a possible solution as far as I can see - they can be made available if they would be of help.
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I have just saved all event logs that contain any event data.
There are entries in the following log that may explain what is happening - hopefully data supplied will trigger an answer or a process I can employ.
Event Log: Microsoft-Windows-WindowsUpdateClient/Operational
Shows:
* EventID 42 // Keywords 0x4000000000000480
* EventID 42 // Keywords 0x4000000000000480
* EventID 30 // Keywords 0x4000000000000001
* EventID 42 // Keywords 0x4000000000000480
* EventID 42 // Keywords 0x4000000000000480
* EventID 42 // Keywords 0x4000000000000480
My upgrade window is still hung at 99%.
Hopefully the above means something to someone.
I can supply full details if required.