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Why can't two or more programs be installed at the same time in Windows 10 Pro?
Another installation is in progress. You must complete it before continuing this one.
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Most of the installation programs use the standard Microsoft Windows subsystem - Windows Installer.
While one program is using this subsystem, the rest are nervously smoking, waiting for it to be released.
If you do not use standard mechanisms, you can install and remove at least a hundred programs at the same time.
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