pol.exe - Entry Point Not FoundFollow

My mother decided to try to fix the computer while I was away for a while. Not sure if that's related to this error message that I get when I try to open PlayOnline. I've tried every shortcut and the actual link to POL and I've re-installed it three times as well. O.o;

**********************************
pol.exe - Entry Point Not Found

The procedure entry point ?MakeHook@@YA_NPAUHWND__@@@Z could not be locatedin the dynamic link library polhook.dll.
**********************************

Anyway, can someone help me? I'm not a computer expert by any means, and I need my FFXI. ; ;
Help is GREATLY appreciated! *bow* *bow* *bow*