Wich version you use??You have to install a Lite version of 32 bit Windows, then also turn off a lot of features and do various tweaks, disable page file etc. You also dont need to do updates. With Diablo i think he only means to link the essential files to run the game, which are all in the batch file text.
start
run
cmd
"C:\Diablo III\Diablo III.exe"
it will update the files and be ok
if it doesnt work, you did smth wrong
Wich version you use??