0000003a - Installation involves creating a scheduled task on the computer. Windows 7

Hi I have just sucessfully deployed 5 Win 7 PC's remotely using SCC 4.0.

I now have one PC that is returning this message.

'0000003a - Installation involves creating a scheduled task on the computer. Access was denied when creating this task. The default admin share (called C$) may not be accessible or a required service may not be running.'

I have done as suggested in this link on the KB but no joy. Used several domain accuonts and even the domain admin accounts and that still does not work

http://www.sophos.com/support/knowledgebase/article/13063.html

Any ideas anyone?

C$ admin share is there and I am using the same domain admin account to deploy from SCC

Thanks

Andy