It was trying to install the drivers for the PB. Although 10mins is a bit too long. If I were you I would restart the pc, reinstall the desktop manager and try again. If it fails, download ccleaner, do a cleaning and repeat the steps. Don't forget that there are two other ways to transfer files and folders to and from pb.
To transfer movies from your PC to you PB.
1) the wifi file sharing option: tap the gear icon on the top right corner of your PB. from the drop down menu scroll down and tap in "storage and sharing". Tap on File sharing", "wifi sharing" and "password protect" to give them the value "on". It will ask you to create username and password. Make sure that you write them down somewhere (they are case sensitive) cause there is no way to retrieve them if you forget them. Now, on the left menu go all the way up and choose "about". The top line says "view information about your tablet: General". Click on the general and choose network. Make a note on the numbers next to iPv4. Ignore the right slash and the two numbers after it.Now go to your PC, open the a windows explorer and at the address bar type without the quotes "\\Numbers_next_to_iPv4"\media. Ok, seriously now, put the numbers NOT the sentence. Now you are inside your palybook from you pc. In the window that will appear double click on the media folder, it will ask you for username and password which are the ones that you created earlier and now its a matter of dragging and dropping your videos to the video folder.
2) Just connect your PB to your pc using the supplied usb cable, and then its another drive in your PC so just drag and drop.