Here are some helpful tips:
One of the things I had to do was go in on the dive preferences and start to switch the USB ports till the right one was found. The software does not detect where you plug in the cable after you download the program and updates.
1: Please try to delete all the file content in your personal TEMP directory (normally in c:\documents and settings\customers name\local settings\temp) and Internet Explorer (c:\documents and settings\customers name\local settings\temporary internet files).
Or you can try to use the application in Start->Programs->Accessories->System Utilities->Clear Disk and select Temp and IE Directory
After that try to reinstall.
2: In your Control Panel->Installed Application do you see a NI Visa entry? If yes, you do not need to install the visa260.msi setup (due to same installation package).
You can optionally uninstall it and launch to visa260.msi setup.
If this fail do the following steps:
1) Click the Windows Start button, select Run, and type the following command in the Open field:
%systemroot%\installer
2) download from
http://www.farinaperseu.com/iris/NIvisa260Runtime.msi and save in that directory (normally C:\WINDOWS\Installer)
Now you can continue on your process.