I was playing Guild Wars today, and right out of nowhere my game froze and I had to reboot my system, then this error report came up

BCCode : ea BCP1 : 862F79E8 BCP2 : 85C3EF60 BCP3 : 85D73E90
BCP4 : 00000001 OSVer : 5_1_2600 SP : 2_0 Product : 256_1

Can anybody tel me what this means and how I can fix this?

Also, please DON'T point out that I have Service Pack 2. There's nothing I can do about it