shit.. That sounds beyond me. I'm very weary about mucking up the whole machine. Right now it's just TVP that's basically unusable (which is bad considering it's a $2k program), but I can't risk the whole thing on a hunch.
In answer to your query schwar, the line I drew was from the bottom left of that hatch to the top left... where the back and forth hatching is coming from is beyond me... I don't think it's my hand from testing. Furthermore, I'm having display settings being forgotten and the wacom photoshop wheel menu come up out of nowhere... in addition to all of the jittery cursor and generally strange behaviour of the program.
I think I'm going to start by reinstalling TVP. Nice and simple. I know it's a shot in the dark, but hey, what's the worst that can happen?
...Perhaps someone will come up with something in the interim. I'm surprised that no one else has chimed in with this issue given the number of ppl who like to use TVP with the Companions and up-to-date Win10... It's some of the strangest behaviour I've ever seen from this program.
I don't know if it's tracking my hand and drawing from that (I'm wearing Wacom's endorsed 2 finger glove), but I get a scratchy line that goes back and forth (see example). I'm also not sure if this is related to the fact that my cursor seems to constantly be flickering? Sorry for lack of description, but I haven't used TVP for a few weeks, and then I come back to being unable to draw a line... lol. Hoping this is something simple that I've overlooked (and not a result of windows update, etc). Thanks. 
