A few years ago I noted to make and keep a bootable OS that we NEVER LEARN to deal with such problems. Read http://tips.oncomputers.info/archives2004/0401/2004-Jan-11.htm and use a more current version like Mint or another.

THERE IS NO REASON TO LEARN THAT OS. WE ALSO DON'T INSTALL IT.

These other OSes don't honor Windows Security and that's a good thing.