Windows 10 Cumulative Update KB4565503 Fixes Thunderbolt Dock Issues

Microsoft has confirmed that Windows 10 cumulative update KB4565503, which was released included in this month’s Patch Tuesday cycle to devices running version 2004, or May 2020 Update, includes a treatment for a compatibility glitch with Thunderbolt docks.

The bug previously triggered an upgrade block for Windows 10 version 2004, meaning computers in which the issue may be experienced were not permitted to install the brand new feature update.

Microsoft explained that computers in which the block is bypassed and Windows 10 May 2020 Update is installed could hit a Blue Screen of Death fatal error.

“Intel and Microsoft have found incompatibility issues when Windows 10, version 2004 (the Windows 10 May 2020 Update) is used with certain settings along with a Thunderbolt dock. On affected devices, you might receive a stop error with a blue screen of death when plugging or unplugging a Thunderbolt dock. Affected Windows 10 devices may have at least one Thunderbolt port, have Kernel DMA Protection enabled and Windows Hypervisor Platform disabled,” the organization said.

Upgrade block removed

Upgrade blocks are typically put in place whenever Microsoft discovers a new issue hitting its latest feature update. They’re lifted when the bugs are resolved, which can typically take anywhere from one week to many months.

The most recent cumulative update for Windows 10 version 2004 thus resolves this problem with Thunderbolt docks, and Microsoft states that computers who have been previously blocked from the obtaining the new feature update can now download it normally.

However, worth knowing is that the upgrade block is “estimated to be removed in the future,” therefore if the May update still doesn’t show up in Windows Update on your device, just wait for a number of days until everything comes back to normal.

Updates via the Media Creation Tool should also be possible beginning today.