Recently, there were reports of a blockade of Windows 11 and 10 ISOs in Russia. Following that, it looks like the block may have been expanded to include Windows Insider Preview builds too.
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Since yesterday, downloads for Microsoft's Windows 11 and Windows 10 operating systems are being blocked in Russia. Thankfully, though, there is a way to bypass this sudden apparent blockade.
Microsoft is suspending all "new" sales of its products in Russia. This includes Xbox, Windows, Microsoft 365, and Azure. The implication is that existing customers will remain supported.