When I am upgrading my windows 8 into windows 10 I am not able to upgrade from last two times I download 9.8gb and at the end it shows file has been corrupted :'( Could you please explain me why it showing this error?
Moved to appropriate area... Title created to reflect issue...
Windows 10 Mobile How-To Guides is for write ups of prepackaged solutions... Not for leading questions on issues not yet resolved. Please do not disrupt threads in the how to guides area with questions on unrelated matters.
From context I believe you are asking about desktop Windows, yes?
You state "Windows 8." You cannot upgrade straight from 8 to 10, you need to upgrade 8 > 8.1 > 10.