The recommended version of Windows to use with the XV4 64-bit version of Q++Studio, is Windows 10 64-bit.
Supported Older Versions
In addition to the recommended version of Windows, above, Q++Studio XV4 64-bit also supports Windows 7 Professional 64-bit SP1 (not recommended for security reasons).
Supported Latest Versions
Q++Studio also supports Windows 11, but as of October 2021, it is not recommended, as it is so new, and support by QuarkXPress and InDesign has not yet been announced.
Versions of Windows that are not supported
Windows Vista and Windows 8 are not supported.