Thanks. Knew about the policy to set no remembrance of previous logon, but that's not ideal for my users.
Generally, any installations or updates that aren't distributed via Group Policy or other remote distributions (i.e., IBM Director or Symantec AntiVirus) we perform on a user's system as the local admininstrator.
However, afterward, the users are often confused by having to change the username back to their own. Since they don't normally have to type it in, they might not remember what it is. And, even more confusing for them is the need to change the domain information from the local computer name back to the Windows domain. The domain field is simply labeled "Log on to:" making it difficult to describe the entry without assertive instruction. (MS could make this easier by simply labeling the field something like "Domain/System".)
A default user name would solve these issues easily.