This is an arrow pointing up and left (or -45 degrees if up is 0 degrees). It's a basic line going from the bottom-right to the upper-left and then an arrowhead on that line continue to point to the upper-left.
This is the Up Left icon for Windows 10
. Here we go. Optimized for 32x32 px, these are the simplest icons in the line style. Downloadable formats are PNG and SVG, among others. Icons8 icon pack is unique in providing a huge number of icons designed by the same team of four designers who create the new icons every working day in the same style and with the same quality. Same cool as the Bat Face, huh.