Teaches Windows

No items matching your keywords were found.

which sites freely teaches unix and any sites to download unix safely and how to switch between windows & unix

Unix, or Linux?
You can find copious amounts of information all over the web.
Solaris is now FREE.

http://www.solaris.com

If you want true UNIX, there you go.

If you want Linux (Unix like, but born for the PC), then I suggest
Fedora Core

http://fedora.redhat.com

Ubuntu is good

http://www.ubuntu.com/

Whatever "flavor" of Linux you choose, only download the ISOs from the products official web site, or mirror sites described / listed on that site. There are usually 100s, depending on the distribution you are seeking.

Leonard Nimoy demonstrates Magnavision LaserDisc Player