All the products on all the supported platforms already have 64-bit JetBrains Runtime 11 bundled and it will be used by default to run the IDE.
Read moreCan I install IntelliJ on Windows 7?
Installation on Windows IntelliJ is compatible with almost all versions of Windows prior to 2003 . A comprehensive list will be: Windows 10/8/7/Vista/2003/XP. It is recommended that you shut down all other applications before you install IntelliJ on Windows.
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