This article was previously published under Q171003
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While you are installing the Windows operating system, your computer may stop responding (hang) while displaying the following error message on a blue screen:
STOP: 0x00000050 PAGE_FAULT_IN_NONPAGED_AREA
This error message may be caused by faulty memory (RAM) in your computer.
To resolve this issue, replace the faulty RAM.
The faulty RAM could be located in any of several areas, including thesecondary RAM cache, the video RAM, or the computer's main memory. Todetermine where the faulty RAM is located, use the following steps:
Disable all caching on your computer, including the CPU cache and L2 cache, in the computer's CMOS settings. For information about how to use your computer's CMOS configuration tool, please refer to your computer's documentation.
If you can successfully install Windows after disabling all caching, try re-enabling each cache, one at a time, to determine the area in which the faulty RAM is located. If you still receive the error message, continue to the next step.
Temporarily replace your video adapter. If you can install Windows after replacing the video adapter, the video adapter you replaced is faulty.
Temporarily replace the main memory installed in your computer. If the RAM in your computer consists of multiple SIMM modules, you may be able to swap SIMM modules to determine which has the faulty memory.
For example, if you have four modules of 8 megabytes (MB) each, remove two of the modules and try installing Windows again. If the Setup process still does not succeed, swap one of the SIMMs in the computer with one that you removed and try again. Continue this process to determine which of the SIMM modules contains the faulty memory.
For additional information about the error message listed above, see thefollowing articles in the Microsoft Knowledge Base:
183169 Possible Resolutions to STOP 0x0A, 0x01E, and 0x50 Errors
155573 "Stop 0x50" Transferring Files over RAS with Windows NT 4.0
156211 Network Virus Checking Programs and Microsoft Windows NT
162837 Replacing TCP/IP After SP2 Causes STOP 0x00000050
156410 STOP 0x1E or 0x50 Error on Multiprocessor DEC Alpha Computer
164352 Stop 0x00000050 in Tcpip.sys Caused by Winsock Applications
167362 STOP 0x00000050 in Srv.sys When Shutting Down Computer
163620 STOP 0x50 in Rdr.sys If Pathname Too Long in SMB
162438 "STOP 0x50" Accessing Files on Windows NT from Windows 95
160370 Stop Screen 0x00000050 Caused by Fs_rec.sys
Microsoft Windows 2000 Server, Microsoft Windows 2000 Advanced Server, Microsoft Windows 2000 Professional Edition, Microsoft Windows 2000 Datacenter Server, Microsoft Windows NT Server 4.0 Standard Edition, Microsoft Windows NT Workstation 4.0 Developer Edition