Access Deny To spesific Folder

Hi.I’m Farbod and im MCSE from Microsoft.i have big problem.i have one small network with 6 client and Server:WinSrv 2003 Enterprise and Client:WinXp Pro Sp2 .i had folder on server with permission like this:cant anyone on network access to that unless Administrator Window.win srv 2003 infected by Virus and when Disinfected and try to boot again window show me the error.cant find ntfs.sys on System32.problem here,i want to access to that folder for copy to another H.D.D and i Cant show me the Access Deny i dont know,how to fix this?plz Guide me to solve this problem.