why do you need one? Just use your genuine 7 dvd.
why does it matter why he needs it? Many people who buy a computer with it installed don't have the disk. Why would you waste a post asking a stupid question? Does the reason why help in any way to find a copy? Useless you are. If you can't answer the question then don't respond. I have the same issue, my windows 7 won't start, startup repair stalls and won't start, no safe mode will work, boot disk won't work.
You are correct. There are many legitimate reasons why a person may need a Windows 7 start up disk.
As for the problem you are having, I am experiencing the same thing with a neighbor's PC. Originally, the MBR was infected with a nasty virus, but when that was cleaned, apparently the MBR got trashed. I'm currently working to try to find a way to repair the MBR without resorting to wiping/reloading the disk because I'd like to save the neighbor's data for them.