My computer has a bug that appears about once a month, stays for a couple hours and goes away again. Most keyboard keys are unaffected but when I try to type "p", " ","c" or "b", nothing happens and more strangely, when I type "y", my computer screenshots (the regular "PrtSc" also still works however).
In addition to this the arrow keys work strangely, the left and right arrow keys only let me jump to the end and the beginning of a line and the up and down keys are even stranger, only moving the document view in LibreOffice writer, jumping five suggestions down or up in the firefox adress bar and in Text Editor jumping up and down 48 or 49 lines (most of the time).
My computer has both a linux and windows partition, but because the bug also appears in the boot menu, I can't select the windows one.
If anyone has any idea what could cause this, that would really help.