How to install gfxcore.dll: Copy file gfxcore.dll to the installation directory of the program that is requesting gfxcore. Bifinett Kh 2230 Manual High School there. dll. If that doesn't work, you will have to copy gfxcore.dll to your system directory. By default, this is: Windows 95/98/Me - C: Windows System Windows NT/2000 - C: WINNT System32 Windows XP, Vista, 7 - C: Windows System32 If you use a 64-bit version of Windows, you should also copy gfxcore.dll to C: Windows SysWOW64 Make a backup copy of the original files Overwrite any existing files Reboot your computer. If the problem still occurs, try the following: Open Windows Start menu and select 'Run.' Type CMD and press Enter (or if you use Windows ME, type COMMAND) Type regsvr32 gfxcore.dll and press Enter. If you can't find windows directory try the following: Open Windows Start menu and select 'Run.' Type CMD and press Enter (or if you use Windows ME, type COMMAND) Type%WINDIR% and press Enter.