I was getting the same error which is the reason why I reported here. I was trying to fix this error and suddenly my chrome keeps crashing and this was creating a huge problem. Please help me to fix the problem.
Close everything else on your computer and disable anti-virus and then try it.
You have a lot of tabs open and maybe some of your browser settings aren't allowing downloads or the location you are trying to copy the files to are in some way restricted on your computer.
Also, do as Dave Bear say's and if that doesn't work close everything, power off the system and reboot then try again.
Another thing you can try is a different browser.
Is this a home system or work system? If work system, the company may have network restrictions for downloads or size of downloads.
Another thing I see is that this is an educational version - do you have a "Current" and "Valid" serial number for it?
Make sure that you have "Checked" all the boxes for all the files you need to download in the steps where you are selecting what files or options you want.
Try to do a Download only - and then after files are downloaded you can install. This is a faster / better way to do an install and will insure you have downloaded all the needed files to your hard disk.