Cardspace error

I'm having problems with Cardspace. When I try to use it I get an erroro that says:

An error occured accessing the Windows Carspace. Please check the event log for more details.

In the event log it says:

An error occurrred while accessing the card collection. Either the store directory or the store file ACLs were found to be tampered. The ACLs have now been restored to their default settings.

An error occurred when communicating with the Windows CardSpace service. An unknown exception has caused the request to fail. For more information, please see the event log.
Inner Exception: Attempted to perform an unauthorized operation.

Any ideas how to fix this?

David

Thanks for the link.

I tried running sfc scan - it ran without finding any errors

I tried switching the Windows cardspace service off and re-booting, the error message is now changed to

An error occurrred while accessing the card collection. Either the store directory or the store file ACLs were found to be tampered. The ACLs have now been restored to their default settings.

An error occurred when communicating with the Windows CardSpace service. An unknown exception has caused the request to fail. For more information, please see the event log.
Inner Exception: Attempted to perform an unauthorized operation.

It's still not working, any other ideas?

Hi, I ended up creating a new account and that fixed the problem. Something must have been corrupted in the account.

Thanks for the help.