Good studies, bro! You have a good grasp of the forms. Your mech designs are tight! I would love to see one finished. I'm in envy of your design skillz. I feel guilty now that you're still working on the Jack The Giant Killer thingy. Please keep it up!
No prob about your current dilemma with your pc. I've experienced that before as well. It is a bummer waiting for a paint stroke to appear haha.