Installing Fedora and preserving Grub

edit

Welcome to ask.fedora. I've removed the inappropriate commercial link from your question. Please don't do things like that again.

@sideburns, don't you think it's strange to install F25 now, when it's almost or completely out of support? Maybe the only reason for the post was the link you've removed?

for anyone reading and thinking this is real "user" asking:

a) F24 is now 2.5 years old 
b) it's totally normal to install a bootloader when an OS gets installed to a pc
c) overwriting old, buggy, outdated bootloaders isn't something you wanne prevent.
d) Windows gets detected automatically these days, so grub will add it by default, means there is no reason to keep the old bootloader.

ofcourse it was a bot.. each week a doozend gets removed and silenced ;)

The link was tacked on at the end, almost as an afterthought, which is why I just removed it and didn't ban the poster as a spammer. Let's see if he learns from the experience.