12. Hard Locks and Soft Locks
A Hard Lock, which refers to having to shut the system down manually, is usually RAM or network card related. This can sometimes be fixed by updating network card drivers, firmware on the modem or router, disabling checksum offload and/or changing duplex settings. Steps for popular network cards and known fixes are available at the link below. Blizzard Support
Another possibility is that the system RAM may be faulty, is incompatible with other RAM in the system, or was not configured properly through the BIOS after installation. Please run a test, such as the one linked below, to check the RAM for errors. Microsoft Online Crash Analysis
It is also recommended that if you have installed new or additional RAM that you contact your motherboard and RAM manufacturers to obtain the correct settings to operate the RAM you have installed properly. 11. Blue screen crashes (Windows)
A blue-screen error typically indicates a fundamental hardware conflict or failure. This failure causes one of the computer devices to shut down as a safety measure, to prevent damage to the computer. There are many types of blue screen errors, it is important to write down the exact error message that is displayed for proper troubleshooting.
Blue Screen Error "IRQL_NOT_LESS_OR_EQUAL" (also "STOP 0x000000D1")
According to Microsoft this error is typically caused by bad drivers. Please make sure you have all the latest drivers installed for each of your hardware components. This includes, but not limited to your video, sound, network card, and motherboard drivers.
Blizzard Support page: Blizzard Support
Microsoft Support page: ( http://support.microsoft.com/default.aspx?scid=kb;
[LN];818501 ) copy and paste into the URL box of your browser
If you are receiving the Blue Screen Windows error screen concerning the "NV4DSP.Dll" file, you may need to update your video drivers to the latest version or revert your video card drivers back to an older version. If you haven't yet, please make sure you install the latest video card drivers and if that does not help, try reverting your video card drivers to an older version. To update or install an older version of your video card drivers, please go to the Nvidia website: ( Drivers - Download NVIDIA Drivers
). If you need assistance on how to do this, please contact your computer manufacturer, the manufacturer of your video card, and/or a local computer technician.
Some players have found that disabling trilinear filtering in the World of Warcraft Video options can also prevent this error.
Blue Screen Error "PAGE_FAULT_IN_NONPAGED_AREA"
The page fault error message is usually a driver or hardware failure (often memory-related) and more info can be found on Microsoft's Bug Check page: STOP: 0x0000000A (parameter, parameter, parameter, parameter) IRQL_NOT_LESS
Updating or reinstalling your device drivers may fix the problem unless it's hardware related. You can find some general tips on that on our Driver Update Information page: Blizzard Support
Blue Screen Error "STOP: 0x0000008E"
The key in finding the failure behind this problem depends on what other information Windows gives you. Typically this error is caused by one of two problems. The first is a memory issue, and Microsoft says it can be fixed by making sure you have the latest updates: You receive a random "0x0000008E" error message on a blue screen in Windows XP
It also references NVidia drivers being corrupted (http://support.microsoft.com/default.aspx?scid=gp;
[ln];kberror&style=error ). If you have an Nvidia card, it's possible that this error is caused by bad drivers. Make sure you completely uninstall the old drivers and reinstall the new drivers (simply reinstalling might not fix the problem).
If you have problems still, you'll need to contact either Nvidia or Microsoft for further assistance.
Microsoft: Microsoft Support