cant install ArcGIS 10 sp4

Discussion created by bjfamilia on Jul 23, 2012
Latest reply on Jul 23, 2012 by vangelo-esristaff
i get the message "This patch package could not be opened. Contact the application vendor to verify that this is a valid Windows Installer patch package." i have tried the following but still no success
This is what I did to install it:
1.) COPY the msiexec.exe file from C:\windows\system32 to where your service pack is.

2.) Start a command prompt

3.) "cd" to where your service pack and the msiexec.exe files are.
e.g. cd c:\temp

4.) type the following at the command prompt:
msiexec.exe /p ArcGISDesktop10sp4[ATTACH=CONFIG]16321[/ATTACH].msp REINSTALL=ALL REINSTALLMODE=omus