9 Dec 09: “Problem detected and Windows has been shutdown to prevent doing damage to your computer. Page_fault_in_nonpaged_area 0x0000005, 0xC17ED71C, 0x00000000, 0x804E70DD, 0x00000000 Beginning dump of physical memory. Physical memory dump complete. Contact system administrator or tech support group for further assistance.” Then this report from AVG: “AVGREP.txt” read: AVG 8.5 Anti-Virus command line scanner / Copyright (c) 1992 - 2009 AVG Technologies Program version 8.0.401, engine 8.0.426 / Virus Database: Version 270.14.103/2558 2009-12-11 C:\Documents and Settings\JC\Local Settings\Application Data\Microsoft\Windows\UsrClass.dat Locked file. Not tested. C:\Documents and Settings\JC\Local Settings\Application Data\Microsoft\Windows\UsrClass.dat.LOG Locked file. Not tested. C:\Documents and Settings\JC\NTUSER.DAT Locked file. Not tested. C:\Documents and Settings\JC\NTUSER.DAT.LOG Locked file. Not tested. C:\Documents and Settings\NetworkService\Local Settings\Application Data\Microsoft\Windows\UsrClass.dat Locked file. Not tested. C:\Documents and Settings\NetworkService\Local Settings\Application Data\Microsoft\Windows\UsrClass.dat.LOG Locked file. Not tested. C:\Documents and Settings\NetworkService\NTUSER.DAT Locked file. Not tested. C:\Documents and Settings\NetworkService\ntuser.dat.LOG Locked file. Not tested. C:\pagefile.sys Locked file. Not tested. C:\System Volume Information\ Locked file. Not tested. End of Report. WHAT are the solutions for the above? P.S. I have NO "network" setup.12-14-2009 this error appeared at 10:38 PM after I’d left the computer in “Stand By” mode for the night which I saw on the morning of 12-15: szAppName: Winlogon.exe sz AppVer: 0.0.0.0 szModName: User 32.dll [and…] sz ModVer: 5.1.2600.5512 offset: 000092a1 It was prefaced by stating the computer had been shutdown to prevent damage (again). Thanks!1 person needs an answerI do too