Hey guys. I've had my MBP for about a year-and-a-half now. It has worked fine thus far, but now I am experiencing a blue screen that flashes occasionally. It isn't during startup or shutdown, but at random times. The flash will last for a second or two, but the frequency seems to be increasing. I have my MBP connected to a Dell monitor and have had it connected for about 8 months. This is the first time it's happening. Does anyone know what this is or what's causing it? Is this going to keep getting worse and worse? Would scrubbing the hard drive help matters? I have everything backed up, so it wouldn't be a huge deal... Any help would be greatly appreciated.