A Required CD/DVD Drive Device Driver is Missing

I downloaded a Windows Server 2008 R2 ISO from Microsoft licensing. I inserted the ISO into a a Hyper-V virtual machine and started the installation. Very soon this message appeared in a window:

“A required CD/DVD drive device driver is missing. If you have a driver floppy disk, CD, DVD, or USB flash drive, please insert it now.”

PBUMCHV driver needed

A bit strange to see it complaining about a CD/DVD drive when it is reading from an ISO. I spent awhile searching for drivers for the physical CD/DVD etc. until I came across this post with the answer.

Long story short, the ISO download was incomplete:  it was only about 540MB instead of 2.3GB. I re-downloaded and the installation ran fine.

2 thoughts on “A Required CD/DVD Drive Device Driver is Missing

  1. Ken

    hmmm, this happened to me as well. my unfinished iso was ~540 MB too. thanks for the tip

  2. Someone

    Okay well I have this error and know it’s not an unfinished download. I have an image on a usb stick in which I have imaged every optiplex 330 with so far. This final one is throwing this error. I have tried other recommendations such as: moving cd rom to first boot, and changing RAID to AHCI. I still get this error. Only other thing I can think to do is flash the BIOS because it’s NOT the image. The image works fine on every other system but this one.

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