Plesk upgrade fails: The older version cannot be removed



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    Signor Rossi

    Instead of step #2 and #3 in the Windows cache manipulations part, one can find local package name directly by its non-cached name.

    1. Find out product code in the  HKLM\SOFTWARE\Classes\Installer\Products\  hive:
      PS C:\> reg query HKLM\SOFTWARE\Classes\Installer\Products\ /f "webmail.msi" /s
          PackageName    REG_SZ    webmail.msi
      So we need 32458DC911F747645AF257819E1DB266
    2. To get the LocalPackage value add the product code from previous step and InstallProperties to the HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Products\ hive:
      PS C:\> reg query HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Products\32458DC911F747645AF257819E1DB266\InstallProperties | findstr "LocalPackage"
          LocalPackage    REG_SZ    C:\Windows\Installer\18ea00.msi
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