virtualbox.org

Cannot start any Virtual Machine - getting the error:
Invalid (malformed) file/path name. It used to work just a few weeks ago. Among recent changes - I have installed a new GPU.
The virtual machine is a standard image for MSEdge from Microsoft's site.

The 'malformed' message is unusual, but the hardening error code is 1, see Diagnosing VirtualBox Hardening Issues

OYehorov wrote:I have installed a new GPU.

Some GPU drivers have poorly-signed security certificates, though I didn't see any errors on the drivers in the log. Maybe the VM's vbox.log might show something.

Try running the VM with 3D acceleration turned off, see if it runs.