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On Windows XP SP3, Firefox 17.0.1 crashes upon exit with this error: "The instruction at "0x7c84495d" referenced memory at "0xf94d9326". The mem could not be r

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  • Last reply by SgtSarcasm

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Here is the error in total: "The instruction at "0x7c84495d" referenced memory at "0xf94d9326". The memory could not be "read. I have tested this on several of our workstations, all with the same error.

I have started FF in Safe Mode and the error comes up. I've uninstalled it, renamed the install directory and still the error persists. I've updated the plugins to no avail. In Windows 7, this issue does not occur. Since it crashed upon exit, the Crash Recorder doesn't come up.

Here is the error in total: "The instruction at "0x7c84495d" referenced memory at "0xf94d9326". The memory could not be "read. I have tested this on several of our workstations, all with the same error. I have started FF in Safe Mode and the error comes up. I've uninstalled it, renamed the install directory and still the error persists. I've updated the plugins to no avail. In Windows 7, this issue does not occur. Since it crashed upon exit, the Crash Recorder doesn't come up.

All Replies (4)

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This can be caused by an extension (possibly with binary components) that isn't closing properly or a plugin.

You can also check for problems caused by security software that maintains a lock (handle) on specific files.

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I've already started Firefox in Safemode and the same issue persists. I've also gone in and manually disabled all add-ons and againk the same issue.

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Do a malware check with some malware scanning programs on the Windows computer.
You need to scan with all programs because each program detects different malware.
Make sure that you update each program to get the latest version of their databases before doing a scan.

You can also do a check for a rootkit infection with TDSSKiller.

See also:


Do a clean reinstall and delete the Firefox program folder before reinstalling a fresh copy of Firefox.

Download a fresh Firefox copy and save the file to the desktop.

Uninstall your current Firefox version, if possible, to cleanup the Windows registry and settings in security software.

  • Do NOT remove personal data when you uninstall your current Firefox version, because all profile folders will be removed and you will also lose your personal data like bookmarks and passwords from profiles of other Firefox versions.

Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.

Your bookmarks and other profile data are stored in the Firefox Profile Folder and won't be affected by an uninstall and (re)install, but make sure that "remove personal data" is NOT selected when you uninstall Firefox.

If you keep having problems then also create a new profile.


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I've already done all of these things and if all of our machines in our environment are affected by some sort of Malware, then we're all in a lot of trouble. Here is my troubleshooting information:

Application Basics 
Name 	Firefox
Version 	17.0.1
User Agent 	Mozilla/5.0 (Windows NT 5.1; rv:17.0) Gecko/20100101 Firefox/17.0
Profile Folder 	Show Folder 
Enabled Plugins 	about:plugins 

Build Configuration 	about:buildconfig 

Crash Reports 	about:crashes 

Memory Use 	about:memory 

Extensions 
Name 	Version 	Enabled 	ID 
Firebug	1.11.0	false	firebug@software.joehewitt.com
Microsoft .NET Framework Assistant	1.0	false	{20a82645-c095-46ed-80e3-08825760534b}
Qompliance	0.3.8	false	{7832a088-1e21-4d75-9fec-2233485d8d1a}
SLoMoz	6.2	false	{BC342BE4-9FE8-11D9-9124-000D56391945}
Important Modified Preferences 
Name 	Value 
browser.cache.disk.capacity	1048576
browser.cache.disk.smart_size.first_run	false
browser.cache.disk.smart_size_cached_value	1048576
browser.display.background_color	#C0C0C0
browser.display.use_system_colors	true
browser.places.smartBookmarksVersion	4
browser.startup.homepage	http://cache/
browser.startup.homepage_override.buildID	20121128204232
browser.startup.homepage_override.mstone	17.0.1
extensions.lastAppVersion	17.0.1
network.automatic-ntlm-auth.trusted-uris	http://ingdirect.com,http://cache,http://cacheresources,http://ingdecache,http://ingdeverone,http://exfocus,http://ingde…
network.cookie.prefsMigrated	true
places.database.lastMaintenance	1355171117
places.history.expiration.transient_current_max_pages	87176
places.last_vacuum	1323194968
privacy.sanitize.migrateFx3Prefs	true
privacy.sanitize.sanitizeOnShutdown	true
security.warn_viewing_mixed	false
Graphics 
Vendor ID	0x0000
Device ID	0x0000
Adapter RAM	Unknown
Adapter Drivers	RDPDD
WebGL Renderer	Blocked for your graphics card because of unresolved driver issues.
GPU Accelerated Windows	0. Blocked for your graphics card because of unresolved driver issues.
AzureCanvasBackend	cairo
AzureFallbackCanvasBackend	none
AzureContentBackend	none
JavaScript 
Incremental GC 	1
Accessibility 
Activated 	0
Prevent Accessibility 	0
Library Versions 
	Expected minimum version	Version in use
NSPR	4.9.2	4.9.2
NSS	3.13.6.0 Basic ECC	3.13.6.0 Basic ECC
NSS Util	3.13.6.0	3.13.6.0
NSS SSL	3.13.6.0 Basic ECC	3.13.6.0 Basic ECC
NSS S/MIME	3.13.6.0 Basic ECC	3.13.6.0 Basic ECC

Modified by cor-el