Why Do Apps Still Work After Reinstall


  1. andyouf
    Posts : 215
    Windows 10 Home x64
       New #1

    Why Do Apps Still Work After Reinstall


    Hi,

    I reinstalled Windows awhile ago. Formatted and partitioned the system SSD ahead of time. I have a secondary HDD with media that I left alone.

    After the install I tried running a game from the secondary HDD and it ran. My question is how? I thought if I install a program even if it is off the OS drive that the installation would still have made alterations to the previous Windows' registry, settings, files, etc. I don't see how this can run under a new OS install without errors.
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  3. NavyLCDR
    Posts : 18,432
    Windows 11 Pro
       New #2

    Depends on how the programmers wrote the game.
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  4. cereberus
    Posts : 15,487
    Windows10
       New #3

    andyouf said:
    Hi,

    I reinstalled Windows awhile ago. Formatted and partitioned the system SSD ahead of time. I have a secondary HDD with media that I left alone.

    After the install I tried running a game from the secondary HDD and it ran. My question is how? I thought if I install a program even if it is off the OS drive that the installation would still have made alterations to the previous Windows' registry, settings, files, etc. I don't see how this can run under a new OS install without errors.
    Programs may be portable or non-portable. The main difference is portable programs do not make registry changes so can run off any drive.
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  6. andyouf
    Posts : 215
    Windows 10 Home x64
    Thread Starter
       New #4

    cereberus said:
    Programs may be portable or non-portable. The main difference is portable programs do not make registry changes so can run off any drive.
    Hi, was definitely non-portable.
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  7. CountMike
    Posts : 19,518
    W11+W11 Developer Insider + Linux
       New #5

    andyouf said:
    Hi, was definitely non-portable.
    Some would run anyway, maybe with some settings changes.
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