The following steps were necessary to get the 12.1.2 installation to work properly. If the installation currently has been corrupted (12.1.2), run the clean wipe utility from Symantec to start fresh with the 12.1.1 installation.
1. Install a legacy version, in my case I used 12.1.1
2. Disable windows firewall
3. Disable windows defender
4. Disable UAC
5. Uninstall Microsoft Security Essentials completely (this will remove windows defender completely)
6. Open registry and go to
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\
hightlight Session Manager on the right hand side delete the value in PendingFileRenameOperations
7. Allow the SEPM server to push the latest package update to the laptop (12.1.2), it should then prompt that a new update is available and to download now. (This is under the assumption that laptop is sitting in the same container the 12.1.2 version is set to as the default installation package in the SEPM console)
8. Once the installation is complete, reboot the laptop. The version should now show as up to date and on 12.1.2
Fonte : Symantec Connect
