Hi akumbabarns

Is DBA the domain your account is assigned to? it should be the same, it is the same domain you are assigned when login to your workstation; let me explain my environment, it is a laptop with MS SQL 2008 installed, my laptop name is jupiter, and it turned to be the domain I should be using, although I have a local area network, with a different domain name.

If you are unable to access the Report Manager once UAC is re-enabled, then you should try to use the machine name instead of the DBA.