im having trouble downloading MS every time i try to download the full content it loads but then a thing pops up and says

"the contents of this file cannot be unpacked. the executable you are attempting to run has been corrupted. please obtain another copy of the file, verify its integrit, and try agin."

I have tried many time plz can someone help.

Try downloading the 20 parts instead of the full one.

how long do you think it will take.

Depends how good your connection is.