Even though this would mislead the thread a bit but I would love to know what kind of changes you made to the registry? I am curious to know this considering that my Windows 10 takes like a decade to boot up due to my slow HDD speed maybe getting rid of a few bloatware from Reigstery could help me with it?
Another curious thing about windows 10 is that you cannot permanently disable updated what maximum you can do is to delay the updates up to 84 days. I think updates are one of the prime reason which makes windows unusable they update their bloatware on the similar old hardware which really isn't that capable to run latest updates. Moreover most or about all the updates are useless.
What RPM is your HDD? Because I had a ~6yr old laptop with a 5400 RPM HDD with 6GB of RAM and it used to take ~45secs-1min to boot, and that was after maybe 4yrs of usage, during its last two years, it had a lot of stuff on it and it was running a slow CPU too (namely the AMD A4 6210 APU @1.8Ghz), and it used to take maybe 2-3mins to just boot, let alone the plethora of other problems it had.
Now I have a nice laptop with a good SSD, so boot times are very minimal for me.
Now, regarding updates, first of all, I would not actually recommend disabling updates, as a lot of driver updates are necessary for your drivers (especially network adapters, they are notorious for not functioning if proper updated drivers aren't installed). Also, security, you do not want to be vulnerable to security issues, and especially if you use Windows Defender (which is shockingly really good now, probably better than anything else other than maybe Malwarebytes), you get Security definition updates almost everyday, I have even got ~5 security def updates in a day. You wouldn't want your PC to be vulnerable to major security flaws, which you will be, if you do not update. That is THE reason people should have switched over Windows 7 to 10, as Win7 isn't actively patched and updated.
If the timing of the updates disturb you, you can set your work hours as "Active hours", that prevents windows from restarting. But I would not recommend disabling updates altogether, that leave you, (any bitcoins that you have on your PC wallet), and other devices in your network vulnerable to attacks.
Now if you do want to disable updates (again,
not recommended), you can use the Group Policy Editor (in Win10 Pro, I don't think its available in Win10 Home), and then you can disable automatic updates. There is also a way to permanently remove the updates, by modifying the registry (make a backup, and don't do anything you're not sure of, modifying this can mess a lot of stuff up!!) in the path
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows
You can do that using the steps in this link (also has a few other ways to do so):
https://www.windowscentral.com/how-stop-updates-installing-automatically-windows-10Bloatware:
You might find a few windows store apps installed when you first book, like Candy Crush and etc. You can simply remove them from windows store. Apps like McAfee are installed by system manufacturers/integrators (if you didnt install windows yourself, these system integrators do put a lot of bloat). Remove McAfee completely, it is a huuuge resource hog. You can use something like IOBit uninstaller. That removes all traces of these software. Any other apps can probably be removed from the Windows Store, control panel. There are a lot of other things you can/should uninstall/disable, and I probably cant list them in this post, but I can provide you with more links if you want.
If you want to find and troubleshoot resource hogs, you can use SysInternals by Microsoft to do so, it has lost of tools so it might feel overwhelming at first lol, but each tool is for a different use and you can find the ones that you need and just google some guides to help you use it.