I don't agree with the solution to uninstall the product....  My earlier reply showed my 4 attempts to fix the problem...

On Attempt  # 4 ...   I went to " Update"  ...which updates all installed products with out an uninstall.... I did not even add a product... I just hit   " Next"... and it does a full update of all products  without an uninstall...  it fixes the problem

There is no need to un-install the existing software... its just that some of the update functions are not working when you get an Error 54 code...