Firefox not running after latest update, error AppHangB1

Hello,
2 days ago I uninstalled Microsoft Security Essentials from my pc.
Yesterday I update my Firefox from v. 14.0.1 to v.15.0, since then firefox won't run on this pc. I tried downgrading it to version 14 but it wont work.



Here's the error msg:

Code:

Description:
  A problem caused this program to stop interacting with Windows.

Problem signature:
  Problem Event Name:	AppHangB1
  Application Name:	firefox.exe
  Application Version:	15.0.0.4619
  Application Timestamp:	50382fcd
  Hang Signature:	337e
  Hang Type:	0
  OS Version:	6.1.7601.2.1.0.256.1
  Locale ID:	1033
  Additional Hang Signature 1:	337e2e97cafd6c9fa279a54a8c89e8aa
  Additional Hang Signature 2:	6981
  Additional Hang Signature 3:	69814920db2de164ed020c3d0d555c45
  Additional Hang Signature 4:	337e
  Additional Hang Signature 5:	337e2e97cafd6c9fa279a54a8c89e8aa
  Additional Hang Signature 6:	6981
  Additional Hang Signature 7:	69814920db2de164ed020c3d0d555c45

Read our privacy statement online:
  http://go.microsoft.com/fwlink/?linkid=104288&clcid=0x0409

If the online privacy statement is not available, please read our privacy statement offline:
  C:\Windows\system32\en-US\erofflps.txt

Thank's in advance !

koolkat77 said:

Welcome to the forum.

Did you download firefox from its home page?

Did you restart after uninstalling it? (Not necessary) But in some cases it works.

Download Ver 14.0.1 from the link below, but Reboot your computer before installing.
Download Firefox 14.0.1 - FileHippo.com

Also do you have Ccleaner installed?
Go to the Registry tab | Scan for issues | Fix selected issues | You will be prompted for keeping a back up, hit yes if you do, if not hit no and Fix all selected issues. Reboot then try install firefox.

Do post back results.

I downloaded firefox from filehippo.
I did restart after uninstalling it.

Scan before uninstalling FF15


Scan after uninstalling FF15



I installed FF14 from filehippo. Firefox is running normally now but it is add-on free.

I re-installed Microsoft Security Essentials too.

koolkat77 said:

So is your problem solved?
You might have to download your addons again.

I will download the add-on "foxmarks'' and run a test.

Nope, still not working :/

Code:

Description:
  A problem caused this program to stop interacting with Windows.

Problem signature:
  Problem Event Name:	AppHangB1
  Application Name:	firefox.exe
  Application Version:	15.0.0.4619
  Application Timestamp:	50382fcd
  Hang Signature:	337e
  Hang Type:	0
  OS Version:	6.1.7601.2.1.0.256.1
  Locale ID:	1033
  Additional Hang Signature 1:	337e2e97cafd6c9fa279a54a8c89e8aa
  Additional Hang Signature 2:	6981
  Additional Hang Signature 3:	69814920db2de164ed020c3d0d555c45
  Additional Hang Signature 4:	337e
  Additional Hang Signature 5:	337e2e97cafd6c9fa279a54a8c89e8aa
  Additional Hang Signature 6:	6981
  Additional Hang Signature 7:	69814920db2de164ed020c3d0d555c45

Read our privacy statement online:
  http://go.microsoft.com/fwlink/?linkid=104288&clcid=0x0409

If the online privacy statement is not available, please read our privacy statement offline:
  C:\Windows\system32\en-US\erofflps.txt

koolkat77 said:

Which version do you have installed now?

Application Version: 15.0.0.4619