Hey anyone any ideas on this? I was running 2 x 512 pc2100 266 ddr rams. I put in an additional 2 x pc 3200 ddr 400 which are compatible with the pc2100. All worked fine after the first reboot. The next time I tried restarting windows it came up with the NtFs.sys error page_fault_in_nonpaged_area. I removed one of the new ram sets and all worked fine for the evening. now I just get the blue screen with windows shut down start in safe, last good config, normal etc. no matter what I try the next screen is the windows shut down to prevent damage and again the NtFs.sys error. even when taking both the new rams out still no luck....any ideas?