cannot coppy file mmsys.cpl during xp sp2 installation

i recieve an message stating that they file mmsys.cpl cannot be coppied and
to plaease make sure the file location is correct. it is and when i check my
folder it is there. any one know what might cause this

http://www.michna.com/kb/WxSP2.htm#C...Service_Pack_2
Cannot install Service Pack 2
Scroll to: Cannot copy file

Mull300 wrote:
> i recieve an message stating that they file mmsys.cpl cannot be
> coppied and to plaease make sure the file location is correct. it is
> and when i check my folder it is there. any one know what might
> cause this