Crash signatures ^{( what's this? )}: UserCallWinProcCheckWow

This crash is often caused by a plugin (particularly the Google Talk plugin). You can disable the plugin by following the following steps:

1. Open the Add-ons Window by clicking the Tools menu and selecting Add-ons.
2. In the Add-ons window, select the Plugins panel.
3. Select Google Talk Plugin and then click the Disable button.

For other plugins, see Troubleshooting Plugins.
If disabling all your plugins does not fix this crash, see Is my Firefox problem a result of malware.

For troubleshooting other types of Firefox crashes, see Firefox crashes