And somewhere in a data center, another Windows box silently stopped breathing, waiting for its own 2 AM hero.

She checked if the driver was even present. On the source machine, she opened C:\Windows\System32\drivers and looked for vmware-ctk.sys . Nothing. That meant Converter never installed it properly—or the OS blocked it.

She uninstalled Converter completely from the source machine (cleanup with Converter standalone clean-up utility ), deleted leftover VMware folders from ProgramData and AppData\Local , then reinstalled. Still broken.

She had done this a hundred times.

She opened gpedit.msc and checked: System > Device Installation > Specify digital signature verification for device drivers. It was set to "Block." Even test-signed drivers were rejected.

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