574942 - Firefox does not load on desktop after definition update from Windows Defender

Status: RESOLVED WORKSFORME

(Firefox :: General, defect)

Description

[Matt Denius]

User-Agent:       Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; iOpus-Web-Automation; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; Media Center PC 5.0; SLCC1; .NET4.0C)
Build Identifier: 3.6

I installed a Windows definition update that displayed on my desktop.  After that installation my Firefox will not load when I click on the icon on my desktop.   

Reproducible: Always

Steps to Reproduce:
1. Install Windows Defender Update KB9155 Definition (1.85.753.0)
2. Click on Firefox icon on desktop

Actual Results:  
Same as above

Expected Results:  
Firefox browser should load onto screen and Im allowed to surf the web. 

When I look at icon now the words "Safe Mode" display.  Also, I have uninstalled the application and reinstalled and to no avail.   My wife uses the same computer but did not install the defintion file, her Firefox works great.  

Help! Working in IE is awful!!!!

BTW - It says I cannot uninstall definition file.  If you want screen shot of definition file explanation I will be glad to send to you.

Comment 1

[Matthias Versen [:Matti]]

Please try the safemode:
http://support.mozilla.com/en-US/kb/Safe+Mode

and if that doesn't help try a new profile :
http://support.mozilla.com/en-US/kb/Managing%20profiles