Does Upgrade from 7 to 10 Create a new Registry or uses old?


  1. Manigue
    Posts : 37
    Win 10 Home 64 Bits
       New #1

    Does Upgrade from 7 to 10 Create a new Registry or uses old?


    I will upgrade to Win 10 during Christmas.
    Would like to know if an upgrade from 7 creates a fresh/clean new registry, or does it use the existing win7 one?
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  3. jds63
    Posts : 3,264
    Windows 11 Pro 64 bit Version 21H2
       New #2

    Going to say it will create a new one, the entries from existing software will be added. Particular reasons to ask this ?
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  4. Almighty1
    Posts : 1,091
    Windows XP/7/8/8.1/10, Linux, Android, FreeBSD Unix
       New #3

    From my experience, it just uses the old one.
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  6. Manigue
    Posts : 37
    Win 10 Home 64 Bits
    Thread Starter
       New #4

    jds63 said:
    Going to say it will create a new one, the entries from existing software will be added. Particular reasons to ask this ?
    New will be good. The reason is my actual registry still holds so much junk/leftover from old/removed software that I just thought it would be nice to start with a fresh registry.
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  7. Manigue
    Posts : 37
    Win 10 Home 64 Bits
    Thread Starter
       New #5

    Almighty1 said:
    From my experience, it just uses the old one.
    Pitty. Guess the best option will be a clean fresh install after the upgrade.
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  8. LMiller7
    Posts : 1,255
    Windows 10 Pro
       New #6

    When you do an upgrade there will be a combination of the old registry plus the new. This is a complicated process. One of the major reasons for doing an upgrade is to maintain the original registry settings for the system and applications. If the upgrade gave you a fresh/clean registry all of that would be gone. If you have leftovers from uninstalled applications they will remain because Windows does not and cannot know for certain they are unused.

    The only way to get a clean/fresh registry is to do a clean install. Registry cleaners can't do that.
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  9. Ztruker
    Posts : 14,046
    Windows 11 Pro X64 22H2 22621.1848
       New #7

    With the current TH2 release (10586) you can do a clean install and give it your Windows 7 installation key from the COA sticker on the computer, no need to do an upgrade first.

    Clean Install Windows 10 Directly without having to Upgrade First
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  10. jds63
    Posts : 3,264
    Windows 11 Pro 64 bit Version 21H2
       New #8

    Manigue said:
    New will be good. The reason is my actual registry still holds so much junk/leftover from old/removed software that I just thought it would be nice to start with a fresh registry.
    Well said by LMiller, the only way would be a clean install. Should of pretty much figured this myself i knew old registry entries fro mexisting software would be there.
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