On the other hand, users who are removed the block has been able to run older VMware products again.

Unfortunately I forgot the details about the exact reason and can't find the link, where I read (that) suspicion. So the update sets a compatibility block. Addendum: VMware has issued a statement for this topic.įrom what I've heared is, that Microsoft enabled some Hyper-V virtualization feature for a Windows 10 feature, which may conflicts with the hypervisor of older VMware versions. And some users found out renaming vmware.exe to vmware1.exe enables older versions again. Also updating to VMware workstation/Player 15.5 solves that issue. But I got reports from users, that the file sysmain.sdb is write protected – so you need to overtake the ownership.

Update: See the comment below, there is the possibility, to use the Compatibility Administrator Toolkit to re-allow VMware workstation. The sdb file it provides does not block VMware. This is because Microsoft can block the execution of applications or drivers via the sysmain.sdb file. Use the steps are described in the forum. There is also a thread at VMware forum, where this issue has been discussed. We have this issue also in Windows 10 Version 1809. Maybe the patch changes something in kernel isolation. One user wrote, that it has something to do with changes in Hyper-V and may be present since the release of Windows 10 version 1903. There is a thread at, where a user wrote 'Cannot run VMware WS Pro 14 after KB4517211'. Old versions of VMware Workstation no longer work after KB4522015 update 2019) I got a user comment mentions issues with Vmware workstation. Shortly after I've published the article Windows 10: Issues with Updates KB4522015, KB4522016 / KB4517211 (Sept. Update KB4517211 has been released also via Windows Update.

Update KB452201 has been available only via Microsoft Update Catalog, but it is causing several issues (see the knows issues section of KB4522015 and link list below). These are security updates for Internet Explorer, released to mitigate a vulnerability in scripting. Update KB4522015 has been released on Septemfor Windows 19 V1809 – and Update KB4517211 has been released on Septemfür Windows 10 Version 1903.

Vmplayer windows 10