unable to install windows vista sp2

hello vista forum..
once i ve cancelled the installation of this windows vista sp2 (KB948465).
after that i cant install this.. it shows the ERROR CODE:80244018.
so please tel me some idea to solve this problem...

1.Reset Internet Explorer http://www.vistax64.com/tutorials/114310-internet-explorer-reset.html
2.Run cmd.exe with administrative previlliges (right click on this file as admin) and type:

netsh winhttp reset proxy

3.Uninstall all any protected software -firewall,ativirus,antispyware

You can also try install standalone versions http://www.vistax64.com/windows-updates/229199-download-available-standalone-vista-sp2.html

you can try it install both in normal mode and in safe mode