rrp2

I have a W2K Server using Server 2000 and 3 WXP Pro computers on my home network. I upgraded to ver 1.28.277 and keep getting "unexpected_kernel_mode_trap" error on the server after I have turned the network on for approx 10 mins. I uninstalled 1.28.277 and reinstalled the previous version and now I don't have any problems. Also, before anyone asks, I did not install any new drivers or update any. The only item that changed on each computer is to update to ccleaner to ver. 1.28.277. Any ideas?