That sort of stuff is usually a driver-issue (no, not you! the software-bit!
). RBR tends to work pretty well on the most common systems, but it has the tendency to show some weird behaviour on certain hardware/driver-combinations.
The fact that you need to reboot windows (read: reload the drivers) to fix the problem also indicates that there is a driver-issue.
You should definitely try updating the chipset drivers of your mainboard. There are often tons of strange issues with them.
By the way, I lately reinstalled RBR and am now trying to regain my pace with the G25@540° rotation. It has proven to be a whole lot of fun and I've finished every stage of the first three rallies now.
Though to be honest I almost killed the car in Finland. In the fourth stage I slightly damaged two dampers, didn't have the time to fix it in the service park, totally broke them in the fifth stage, spun, flipped the car, lost two or three prop-shafts, lost the brakes, broke 2 wheel-hubs and killed 3 dampers. But I kept going (without brakes!!) until the end of stage 6 and managed to bring home 5th place, securing my championship lead.
I want to see Loeb hurling such a heap of scrap metal through snow-stages at 140km/h with no brakes!
Vain