Is it safe to install Linux alongside Windows?

Yes you can do this. In my experience the golden rule here is to use each operating system’s own tools to manage its partitions, even if the other OS says it can manage them. So, use the Windows Disk Management tool to shrink your Windows partition. Yes, Ubuntu could do it too, but no one k ow windows like Microsoft.

How do I install Linux and Windows on the same computer?

Dual Boot Windows and Linux: Install Windows first if there’s no operating system installed on your PC. Create Linux installation media, boot into the Linux installer, and select the option to install Linux alongside Windows. Read more about setting up a dual-boot Linux system.