Update - 11:00pm EST: I reached NVIDIA's PR for an official statement and they replied within the hour. Read their response and feedback from many gamers here.

Original post - 5:20pm EST: I want to warn all of our visitors who are participating in the StarCraft II Beta to refrain from installing the latest NVIDIA WHQL 196.75 WHQL-certified drivers. If you already installed it, uninstall it and downgrade to the previous version. Yeah, it's that serious. Many players are reporting their PCs or graphic card have died.