Can I install Linux without removing Windows?

Linux can run from just a USB drive without modifying your existing system, but you’ll want to install it on your PC if you plan on using it regularly. Installing a Linux distribution alongside Windows as a “dual boot” system will give you a choice of either operating system each time you start your PC.

Will installing Linux delete my files?

The installation you’re about to do will give you full control to completely erase your hard drive, or be very specific about partitions and where to put Ubuntu. If you have an extra SSD or hard drive installed and want to dedicate that to Ubuntu, things will be more straightforward.