Concurrent Request Output Issue

Sunddenly,in my machine I was not able to open any of the concurrent request's output.
When I clicked on View output,the page tried to open the excel sheet ( which is my output type ), then it closed by itself.

Then I found the below solution to make it work.

1. Tool--> Internet Options --> Security --> Custom Level --> Dowloads --> Automatic prompting for file downloads --> Enable
2. Close the browser.
3. Open a new browser.
4. Retest the issue.

Looks like above is the mandatory setting for a file to get downloaded from concurrent request's output.