The specified domain does not exist or could not be contacted

Question

If the program runs as a domain account, then everything works fine if from a local account on the line checkEntry.Name.ToString(); then exception The specified domain does not exist or could not be contacted.

DirectoryEntry checkEntry = new DirectoryEntry("LDAP://dc=MyDomain,dc=com", @"MyDomain\MyUser", "MyPassword", AuthenticationTypes.Secure);
checkEntry.Name.ToString();

Answer 1

Can there be pending updates (Windows Update)?

I get this all the time if updates ar waiting to install.

After a reboot everything works fine again.