Your Install Disk is a Bootable CD as are MS-diskettes

I'm old and cranky. And totally turned off by these so-called easy to use fire-balls called Bootable CD's. They are not bootable, they are a conglomeration of hair raizing mini-tools to get your computer to the point where you might be able to boot it...and they always come in some format such as ISO whereby you have to be a rocket scientist to build the dang thing.

For my money, it is a darn sight faster/easier to load a clean copy of Windows over the old one, without deleting the extra files when asked.

You should always have a complete copy of the system32 folder at the ready so that you can just copy the old system32 folder over to the cleaned up one.

Also have a disk handy with all of the "programs" you have running so that they can easily be accessed and reloaded should the latter statement not pull its weight.