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Error Installing Backup Exec 2010 R3

Created: 02 Jan 2014 | 4 comments

I have a problem on one of the backup server. Some days ago one of our backup servers had two hard disk failures on a RAID 5 system which resulted in a boot up failure of the windows server. After several attempt I managed to recover the windows server but not the backup exec since the registry was corrupted. I tried reinstalling the backup exec but I had some error. So I decided to uninstall and reinstall the backup exec and then restore the system drive (c:) from a backup. When I am installing a clean backup exec installation, I am receiving an error and I cant find anything about it on the symantec website

The install failed with an Unexpected error: Class not Regstered (Exception from HResult: 0x80040154 (REGDB_E_CLASSNOTREG))

You help will be greatly appreciated

Ruben Hili

Operating Systems:

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ZeRoC00L's picture

I would start with repairing the .NET framework:

If it keeps failing, the best option you have is to install Windows from scratch, install BE and start restoring.

If this response answers your concern, please mark it as a "solution"

CraigV's picture

...have you tried to manually delete every entry in the registry relating to Symantec Backup Exec? If not, do so and then try the reinstall again.


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RHSFC's picture

Hi all,

Thanks for your comments. 

@CraigV : Yes craig I remove every single entry from the registry but it still failed to install

@ZeRoCool: I tried re-installing the .Net Framework but still with error. So I took your advice and reinstalled everyrhing from scratch, and I think this was the best solution. Now I have the CAS server up and running and the backup media server up and running as well but they are clean. Now I was wondering if I do a restore or scrap the old setup and rebuild all my job with the new clean setup. What do you think?

CraigV's picture depends really. If you have a small CASO environment, it might simply be better to redo the configuration from scratch.

If it is a large environment, and you have a backup of the Data/Catalogs folders, then simply restore. 


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