Install Win 7 from a portable CD/DVD drive?

I need to install Win 7 on an old desktop but the original CD/DVD drive works when it wants to. I have a portable USB CD/DVD drive that works just fine on the machine. Can I install Win 7 using the portable USB drive?

I'm asking because when installing windows the system will need to make several reboots and I wonder if it will look for the original CD/DVD drive or will it look for and find the portable USB CD/DVD drive?

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I have done so hundreds of times.

Give it a shot. And if you feel the old CD/DVD drive is trouble, unplug it?

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Install Win 7 from a portable CD/DVD drive?

Thanks, will do.

P.S. Sorry I posted this question in the wrong forum. I had a lot on my mind at the time.

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