Disable your antivirus program and then try extracting the ZIP. If that still fails, you may need to redownload the installer as the antivirus program may have deleted a portion of the files inside the archive.
well if it's in the "c/program files 86 etc. take it out and then extract it from the desktop thats what i did and its working for me dont ecxtract it when its in "cprogramfile86 thingy