Hi, One of my old system's crashed - turned out to be a faulty HDD. I've replaced the hard drive; re-installed Windows XP SP2. But when I continued to build the system - installing all drivers and utilities system started crashing with BSOD showing: PAGE_FAULT_IN_NONPAGE_AREA error message. Hardware specs: ASUS P4PE motherboard BIOS rev. 1007 1 stick of generic PC-2700 512MB RAM Intel P4 2.4 GHz / 533 FSB CPU Video card - ASUS v6600 - GeForce 256 w/32 MB Using on-board sound. Network: on-board 1G Ethernet (broadcom) HDD 60GB Maxtor - PATA 2MB cache. Software specs and order of install: 1) OS - Windows XP SP2 Pro slip-streamed. 2) Drivers: a) Intel INF chipset driver(latest from Intel site for 845 chipset) - reboot. b) Intel Application Accelerator v.2.3 - reboot. c) Broadcom 1G Ethernet driver - from Broadcom's site - 57xx. d) Audio driver for AD1985 from ASUS download site - the latest - reboot. 3) All Windows XP updates and patches from update.microsoft.com - x * reboot. 4) Symantec AV Corporate v.10 - reboot. 5) Nvidia drivers update from Microsoft update site - reboot. 6) Attempt to boot system ... no luck due to corrupted registry file - cannot load C:\WINDOWS\system32\config\SYSTEM file. The above problem has been fixed with running chkdsk /r in recovery console. 7) Boot into Windows XP - working now but cannot install anything else due to the following error. PAGE_FAULT_IN_NONPAGE_AREA BSOD Here is my debug log; can someone confirm that symantec's AV is the culprit (SYMEVENT.SYS); or could this be hardware. BTW: m/b temperature 28 deg C; CPU temperature is in the range 39-42 deg C.