My computer has been running perfectly fine for the past few months.

A few days ago I got back into spiral knights. I love playing again, but it's become very frustrating, to the point of being almost unplayable, because my computer bluescreens once or twice an hour while playing. It happens often enough that I rarely get to the end of FSC without it bluescreening at least once.

OS: Windows 7 Home Premium, 64 bit
CPU: i5-2500k, 3.30 GHz
Motherboard: Asus P8P67
Video card: Nvidia GT 430
4 GB RAM

I have the latest, recommended 64-bit version of Java installed.
My video drivers are up to date.
I have Windows 7 Service Pack 1

The bluescreens have only happened while playing Spiral Knights.

The message I get is this
"A clock interrupt was not received on a secondary processor within the allocated time interval"