Windows 10 and 11 require all drivers to be digitally signed. To use Multikey 1811, users often have to enable "Test Mode" or use a self-signing certificate.
: Users often encounter errors stating "The certificate was revoked." This is fixed by manually signing the multikey.sys file found in C:\Windows\System32\drivers\ SolidCAM 2016 SP1 with Multikey 18.1 Setup | PDF - Scribd multikey 1811 x64 solidcam