Photoshop and Illustrator acting up
All of a sudden my photoshop and Illustrator are acting up. The artboards will slowly and continuously move to the left by themselves and I can drag them back to center but they just keep moving. If I open a new doc or try to resize anything and try to fill in specs, the numbers go crazy. If I hold alt key, everything starts zooming out.... All sorts of things. I've tried restarting PS while resetting presets. Worked for a while in PS but not at all in AI. I'm running CC 2017 on 10.11 OS...I know it's old, but it won't allow me to update. Is there anything I can do short of buying a whole new computer??