This is a patch for ASUSDVD 2000 software for Windows XP. After upgrading to Windows XP O.S. , please uninstall AsusDVD2000 software and re-install it. While keeping Original AsusDVD2000 CD in drive apply this software. It worked for me and now I am enjoying DVDs on my system.
Please post your comments after using this patch. Good Luck all.