!Everyone reading this from finding this thread through search, please be aware that this approach might help, but there is also a possibility of corrupting your OS which would prevent correct usage of the Veeam software, meaning that you will need to completely re-install the OS to be able to use Veeam on it.Hi,
Struggled with a similar issue for several days with getting any version reinstalled. In my installation log was:
***Veeam*** Setup was unable to check installed version. Error code: 0x00000645.
After studying Process Monitor during my installation attempt, I finally pin it down in my case to an Upgrade Code registry entry. I have to remove the entry:
HKEY_CLASSES_ROOT\Installer\UpgradeCodes\8914CA77C66ABE547AC974809A45DE17
Once this had been removed (actually I just renamed it) - installation of the latest V4 product proceeded successfully.
Hope this might help someone.
Iain.
Registry edits are rather dangerous - please for the issues such as the ones reviewed in this thread, consult with Veeam Support first.
Statistics: Posted by Zen — Jan 23, 2025 10:18 am
