Dsetup.dll=derpy .... help?

[drelk001]

so I am on my moms computer and trying to get the game set up on her computer. I am having a problem... the Dsetup showed up as a false positive, that's not a problem it just disappeared, so when I load P99 it says it is missing, I got the P99V33files and it would extract everything but the Dsetup, it was saying it was open on another program lol. so I went online and picked it up from like a third-party program (dll-files.com) and it logged in just fine and dandy, when I got to the Character loading screen it was telling my files out of date..... I tried to delete all the Dsetups and re-download the patch and stuff... same problem as before the not being able to extract blah blah and the spell files out of date..... um....derp? any ideas?