My PC's about 7 years old and starting to slow down, so I wanted to try Linux. But I still need Windows for school, so I figured I'd set up a dual boot. Problem is, when I tried to shrink the partition, Bitlocker blocked me. I've been looking for a fix but haven't found anything that actually works. Disk 1 in the screenshot is just a USB drive, not the main one. Specs: i3-7020U, 4GB RAM, 516GB HDD. Anyone know how to get past this?