Republished on December 14 with Microsoft’s response to dangerous user confusion after a raft of “muddled” articles were published.

Microsoft’s minimum requirements for Windows 11 cover several hardware components, including having enough RAM and a powerful enough microprocessor. But the most contentious issue is whether a PC contains or supports a Trusted Platform Module (TPM), specifically version 2.0, released in 2014.

The flaw has been added to the Known Exploited Vulnerabilities catalog at the U.S. Cybersecurity and Infrastructure Security Agency (CISA), which will require Federal Civilian Executive Branch (FCEB) agencies to apply necessary remediations by December 31st.

As a zero-day security vulnerability posing significant risk to users is confirmed as under active exploitation—the DHS and Microsoft have urged millions to update now.