OK, something's definitely very wrong here. There is no reason why the computer should suddenly restart itself without any warning like this, and it's not the first time!

To be frank, the new system is all nice and wonderful, but the little quirks are starting to set doubts in me: only the front speakers work because the sound card is on-board while I asked for a Sound Blaster sound card; the CD drive makes very strange noises when it reads discs; the computer suddenly restarts without warning (I have a growing suspicion that the CD drive might be at fault here? The incidents occurred today both happened when I tried to read the content of some CDs... Guuzen ka? Soretome...)

Is it time to get it to be checked already?