Sorry for the lack of clarity on the exact version.
We are trying to go to 11.0.6000.550
- Copying the sevinst.exe to a machine that is 'missing' it doesn't really help since it starts asking for additional files afterwards (quite a lot since the installation process seems to stop).
- All our SEP installs are via GPO. We did not deploy 11.0.5.
- Configuring the GPO to uninstall previous versions failed.
- Repairing SAV or attempting to uninstall it does not solve the problem. It would also require a login to each machine and if I'm going to do that I might as well run Cleanwipe instead. The version of SEP that you install is important, as AravindKM mentioned.
- The root cause seems to be the old installation of SAV. New builds or ones with 11.0.4 don't suffer from this problem. But again, we were able to upgrade to 11.0.4 without any issues so why is 11.0.6 being difficult? (Support were not able to answer this question, nor did they seem particularly interested.)
- So far my 'fix' has been to:
1. Run CleanWipe against a machine remotely.
2. Login to the machine to allow CleanWipe to complete the last steps.
3. Check the registry for the key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Group Policy\AppMgmt\{e8a8cee1-a54f-441d-a45e-5f3c6d2f7869}
If this doesn't exist, reboot the machine and allow 11.0.6000.550 to install via GPO.
If it exists, then delete the key, run 'gpupdate /force' and reboot the machine. 11.0.6000.550 will then install via GPO.