HT1926 cant install itunes on windows 7 64bit . cant run a required dll

i cant install itunes on windows 7 64bit . when i run the setup and reach the status : "performing installation checks" , it said "there is a problem with this Windows Installer Package . A Dll required for this install to complete could not be run.v..v" what should i do now ?
Advertisement
Reply

That's a bit rarer. It's a 1723 error message. (1721 and 1722 are more common.)
Even though the following user tip is about slightly different errors (the 1721 and 1722), perhaps try it with your one too:
"There is a problem with this Windows Installer package ..." error messages when installing iTunes for Windows