He knew the portable build was essentially gasping for air. It was looking for resources in a cstrike folder that, according to the temporary environment variables of the café's locked-down Windows XP, didn't technically exist where it should. He started the "surgical" fix:
Sometimes bypassing the GUI precache step works. cs 16 precaching resources problem portable
Follow these steps in order. You likely do not need to do all of them; usually, the first two solve 90% of cases. He knew the portable build was essentially gasping for air