Windows security patches have turned into a double-edged sword for Lenovo users. A recent Microsoft update is blocking critical BIOS updates on ThinkPads, flagging Lenovo’s firmware tool as a “vulnerable driver” and leaving users staring at frustrating error messages.
The culprit? Microsoft’s security blocklist now bans WinFlash64.exe – the executable behind Lenovo’s BIOS Update Utility and Vantage app. What was meant to protect systems is instead bricking update processes across Windows 10 and 11 (including all active 22H2-24H2 versions).
“So how do I update my BIOS now?” You’ve got two options:
1?? Wait for Windows Update to deliver the patched firmware automatically
2?? Grab Lenovo’s fixed v1.61 BIOS (when available) that bypasses the block
Here’s the irony: Lenovo typically recommends against using Windows Update for BIOS flashes, calling their proprietary tool “more reliable.” Yet now, Microsoft’s built-in updater has become the only working solution for many users. Talk about a role reversal.
While Lenovo’s working on a permanent fix, this episode reveals a deeper issue: security vs functionality tradeoffs. When Microsoft’s safeguards start breaking essential manufacturer tools, where do we draw the line? For now, ThinkPad owners should brace for temporary instability – and maybe keep that Windows Update button handy.
