Windows 8.1 Registry - HKLM Is Not Always The Same

New laptop which was recently upgraded from Windows 8 to 8.1

One issue might involve a registry edit so I began to look in the registry but I've noticed something odd when I run regedit. Each time I run it, what appears under HKEY_LOCAL_MACHINE (HKLM) is not always the same. (I was looking for Components under HKLM). Here's an example running it 10 times.

I run regedit and under HKLM see 7 entries

BCD00000000
Drivers
Hardware
Sam
Security
Software
System

Then I exit regedit (without making any changes) and run it again and see that Drivers has disappeared leaving the other 6 entries. Exit and run again I see the same 6 entries. I repeat the exit and run again process seeing the same 6 entries each time, but on the 7th run, Drivers reappears giving 7 entries again. On the next run a new entry, Components appears (between BCD00000000 and Drivers) giving 8 entries. Exit and run again, same 8 entries but then on the next run Drivers and Components both disappear leaving the other 6 entries.

I just run another 10 times or so and each time has 6 entries (no Drivers or Components)