I get that arror sometimes too along with many others, but it's fine when I just restart Diablo, not my entire computer. Idk why you have to restart your computer.

Items for trade:
Windhorn, Eagleforce, Doomfather, Grandbringer, Harlequin Gaze, Vampirecrest, Gladiator's Valor, Arkaine's Bane, and Shaftstart

Looking for Stone of Manald rings. Also, I want Hearld of Arreat and Zakarum's Face.