When I try to update I get an error code U43M1D206.

Installations work, but patches and updates fail with this code. I have ruled out internet connectivity issues and don't know what to do at this point.

I am sorry Kevinmgallagher but U43M1D206 error indicates a download error.  In specific your computer experienced an HTTP error during the download process.
Are you on a managed network?  If not then please review the steps listed in Sign in, activation, or connection errors | CC, CS6, CS5.5 - http://helpx.adobe.com/x-productkb/policy-pricing/activation-network-issues.html to resolve your current error.

Similar Messages

Maybe you are looking for