hello Accel, your crash is caused by a library named ''BitGuard.dll'' - when you google this file name it is often associated with malware, so i assume your system is infected... please run a full scan of your system with the security software already in place and different tools like the [http://www.malwarebytes.org/products/malwarebytes_free free version of malwarebytes], [http://www.bleepingcomputer.com/download/adwcleaner/ adwcleaner], [http://www.microsoft.com/security/scanner/default.aspx microsoft safety scanner] & [http://www.kaspersky.com/security-scan kaspersky security scan]. [[Troubleshoot Firefox issues caused by malware]]

Thank you very much, I've uninstalled BitGuard after searching for informations and so far I have no more problems.