Vmware Vcenter Converter Standalone Unable To Start The Change Tracking Driver Apr 2026

Same error.

This time, the driver installed. The progress bar jumped from 5% to 15%.

Sarah sighed. Not this again. She opened her browser and started the late-night ritual. The VMware forums were full of similar stories—admins stranded at the same 5% wall. Change tracking. That kernel-level driver used by Converter, Backup APIs, and replication tools to monitor disk block modifications. Without it, no incremental sync, no hot cloning. Just failure.

She changed it to "Warn" (temporarily), ran gpupdate /force , rebooted again, and started the conversion. Same error

Scrolling near the failure timestamp, she found the clue:

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

She launched VMware vCenter Converter Standalone 6.2, clicked "Convert Machine," entered the source credentials, and hit next. The pre-check screen looked good—enough disk space, network reachable, agent uploaded. Then she clicked "Finish." Sarah sighed

That made sense. The server was old—Windows 2008 R2 with an older Secure Boot policy and no SHA-2 code signing updates. VMware’s newer drivers used SHA-2 certificates. The OS didn't trust them.

She had done this a hundred times.

Sarah ran bcdedit /set hypervisorlaunchtype off , disabled Hyper-V from Windows Features, removed Device Guard via registry, and rebooted twice (the second to finalize). The VMware forums were full of similar stories—admins

A quick sc query vstor2-mntapi10-shared showed the driver service wasn't there either.

Change tracking driver wasn't the villain. It was just the messenger—alerting her to years of security hardening, feature conflicts, and certificate rot hiding beneath a simple error message.

Bingo. The server had Hyper-V role installed (even though no VMs were running) and Device Guard enabled via group policy. Hyper-V and VMware’s change tracking driver cannot coexist—they fight for the same virtualization primitives.

It was 11:47 PM on a Friday. Sarah, a senior infrastructure engineer, was two hours into what should have been a routine P2V migration. The source machine: an aging Windows Server 2008 R2 box running a critical line-of-business app. The destination: a shiny new vSphere 7 cluster.

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.