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firefox won't start after an update

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  • 1 has this problem
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  • Last reply by zym-101

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I have read other Q&A related to same issue. Following auto-update of Firefox on 22nd Oct. I cannot open Firefox. I have tried the recommended solutions to install a clean version of Firefox both by renaming the Firefox folders and completely deleting them. No change. I have run Malwarebyte and run a system scan with no faults found. I can continue to use MS Edge. Chrome does also not open which would suggest a setting issue or something causing a start up process corruption. I noted other reports that some applications can cause the problems. I do not use Zonealarm. I have removed recently installed apps. including Dropbox.

Both Firefox and Chrome work when pc restarted in Safe mode.

I've checked Win Event Viewer and can find the error record for Firefox (& Chrome). Faulting application name: firefox.exe, version: 56.0.1.6484, time stamp: 0x59d2c74f Faulting module name: ACCELE~2.DLL, version: 0.0.0.0, time stamp: 0x52f04604 Exception code: 0xc0000005 Fault offset: 0x0000000000118a13 Faulting process id: 0x2150 Faulting application start time: 0x01d34d001282c11e Faulting application path: C:\Program Files\Mozilla Firefox\firefox.exe Faulting module path: C:\PROGRA~3\ACCELE~1\ACCELE~2.DLL Report Id: 86e8eb3c-3b4a-4296-857e-810bf54865b0 Faulting package full name: Faulting package-relative application ID:

I've now run out of ideas for fixes. Any ideas, please??

I have read other Q&A related to same issue. Following auto-update of Firefox on 22nd Oct. I cannot open Firefox. I have tried the recommended solutions to install a clean version of Firefox both by renaming the Firefox folders and completely deleting them. No change. I have run Malwarebyte and run a system scan with no faults found. I can continue to use MS Edge. Chrome does also not open which would suggest a setting issue or something causing a start up process corruption. I noted other reports that some applications can cause the problems. I do not use Zonealarm. I have removed recently installed apps. including Dropbox. Both Firefox and Chrome work when pc restarted in Safe mode. I've checked Win Event Viewer and can find the error record for Firefox (& Chrome). Faulting application name: firefox.exe, version: 56.0.1.6484, time stamp: 0x59d2c74f Faulting module name: ACCELE~2.DLL, version: 0.0.0.0, time stamp: 0x52f04604 Exception code: 0xc0000005 Fault offset: 0x0000000000118a13 Faulting process id: 0x2150 Faulting application start time: 0x01d34d001282c11e Faulting application path: C:\Program Files\Mozilla Firefox\firefox.exe Faulting module path: C:\PROGRA~3\ACCELE~1\ACCELE~2.DLL Report Id: 86e8eb3c-3b4a-4296-857e-810bf54865b0 Faulting package full name: Faulting package-relative application ID: I've now run out of ideas for fixes. Any ideas, please??

All Replies (2)

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hi, since this is often a symptom of malicious software active on a system, please run a scan with various other security tools like the free version of malwarebytes, adwcleaner & eset online one-time scanner.

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Hi Philipp, Thanks for the advice. I thought one scan with Malwarebytes was sufficient but not so. Adwcleaner found a few threats but did not resolve the issue. Full ESET online scan resulted in a couple of infected files. After removal Firefox is up and running again. Great result! Think I need to invest in better AV

Mike