ITunes hangs during install in Windows 7 64bit.

I've been having trouble installing iTunes on my Windows 7 Pro 64bit. It hangs at the same place every time. I opened up task manager and found the culprit, DiFXInstall64.exe. When I kill this process, iTunes continues and finishes the installation. Why does it do that? What is DiFXInstall64.exe? And does it cause any problems if I kill the process and iTunes installs as usual? Will that damages the program and give trouble later on?

http://www.microsoft.com/whdc/driver/install/difxfaq.mspx
DifX componentry is used to install the GEAR drivers itunes uses for importing and burning CDs. After the install goes through for you, are there any messages (when opening iTunes for example) indicating that there's trouble with your iTunes burning and importing capabilities?

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