I am not sure if you guys have ever experienced or currently experiencing problem downloading large files from SharePoint. Recently I faced same problem and found one simple solution to this problem.

Please follow simple steps on your computer to resolve this issue.

1. Open a Command prompt window as Administrator on a computer where you are trying to download large files from SharePoint.

2. Type and run following command.

netsh int tcp set global autotuninglevel=disable

3. Now try the downloading same large file again. Now you should be able to download/open file successfully.

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Happy downloading!! :)