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FIREFOX CAN'T RUN WITHOUT "rlls64.dll" FILE?

Posted

I just got virus protection (Webroot) for my computer. And it said that some file called "rlls64.dll" was a very dangerous file and it deleted it off from my computer, and I'm fine with that. Now when I open firefox it brings up this error: the program can't start because C:\Windows\system32\rlls64.dll is missing from your computer. Try reinstalling the program to fix this problem. I love firefox but it can't run without this virus file. Which one should I listen to, Firefox or Webroot?

I just got virus protection (Webroot) for my computer. And it said that some file called "rlls64.dll" was a very dangerous file and it deleted it off from my computer, and I'm fine with that. Now when I open firefox it brings up this error: the program can't start because C:\Windows\system32\rlls64.dll is missing from your computer. Try reinstalling the program to fix this problem. I love firefox but it can't run without this virus file. Which one should I listen to, Firefox or Webroot?

Chosen solution

Okay, I solved it. It wasn't Firefox that wanted to run that DLL it was relevant knowledge, it was modifying Firefox the whole time. Turns out it wasn't completely removed by webroot. I uninstalled it now Firefox runs just fine now.

So if anyone else has this problem just know to

  1. go to "C:\Program Files (x86)"
  2. permanently erase the folder called, "RelevantKnowledge"

and Firefox should be running just fine.

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  • User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.36

More Information

jscher2000
  • Top 10 Contributor
8634 solutions 70618 answers

I don't have that file (running Firefox 65 on Windows 10).

Could you try starting Firefox in its Safe Mode? In its Safe Mode, Firefox temporarily deactivates extensions, hardware acceleration, and some other advanced features to help you assess whether these are causing the problem.

If Firefox is not running: Hold down the Shift key when starting Firefox. (On Mac, hold down the option/alt key instead of the Shift key.)

If Firefox is running: You can restart Firefox in Safe Mode using either:

  • "3-bar" menu button > "?" Help button > Restart with Add-ons Disabled
  • (menu bar) Help menu > Restart with Add-ons Disabled

and OK the restart.

Both scenarios: A small dialog should appear. Click "Start in Safe Mode" (not Refresh).

Any improvement?


If Firefox still won't start, try:

Clean Reinstall

This takes about 5 minutes. It's not about your settings, it's about making sure the program files are clean (no inconsistent or alien code files). As described below, this process does not disturb your existing settings. It's not essential to uninstall Firefox, but you can if you like, saying No to any request about removing personal data.

It only takes a few minutes.

(A) Download a fresh installer for Firefox to a convenient location:

https://www.mozilla.org/firefox/all/

(B) Exit out of Firefox (if applicable).

If you use Microsoft Office, please change your default browser to Internet Explorer temporarily before the next step.

(C) Using Windows Explorer/My Computer (hold down the Windows key and press E to launch it), right-click > rename the program folder as follows (you might have one or both):

C:\Program Files (x86)\Mozilla Firefox =to=> C:\Program Files (x86)\OldFirefox

C:\Program Files\Mozilla Firefox =to=> C:\Program Files\OldFirefox

(D) Run the installer you downloaded in step (A). It should automatically connect to your existing settings.

Any improvement at your next startup?

I don't have that file (running Firefox 65 on Windows 10). Could you try starting Firefox in its Safe Mode? In its Safe Mode, Firefox temporarily deactivates extensions, hardware acceleration, and some other advanced features to help you assess whether these are causing the problem. ''If Firefox is not running:'' Hold down the Shift key when starting Firefox. (On Mac, hold down the option/alt key instead of the Shift key.) ''If Firefox is running:'' You can restart Firefox in Safe Mode using either: * "3-bar" menu button > "?" Help button > Restart with Add-ons Disabled * (menu bar) Help menu > Restart with Add-ons Disabled and OK the restart. ''Both scenarios:'' A small dialog should appear. Click "Start in Safe Mode" (''not'' Refresh). Any improvement? ---- If Firefox still won't start, try: '''Clean Reinstall''' This takes about 5 minutes. It's not about your settings, it's about making sure the program files are clean (no inconsistent or alien code files). As described below, this process does not disturb your existing settings. It's not essential to uninstall Firefox, but you can if you like, saying No to any request about removing personal data. It only takes a few minutes. (A) Download a fresh installer for Firefox to a convenient location: https://www.mozilla.org/firefox/all/ (B) Exit out of Firefox (if applicable). ''If you use '''Microsoft Office''', please change your default browser to Internet Explorer temporarily before the next step.'' (C) Using Windows Explorer/My Computer (hold down the Windows key and press E to launch it), right-click > rename the program folder as follows (you might have one or both): C:\Program Files (x86)\Mozilla Firefox =to=> C:\Program Files (x86)\OldFirefox C:\Program Files\Mozilla Firefox =to=> C:\Program Files\OldFirefox (D) Run the installer you downloaded in step (A). It should automatically connect to your existing settings. Any improvement at your next startup?

Question owner

Reinstalling a fresh one works for the first session. After exiting Firefox and starting a new session error pops up again :(

By the way I'm using windows 7.

Reinstalling a fresh one works for the first session. After exiting Firefox and starting a new session error pops up again :( By the way I'm using windows 7.

Modified by Computer

jscher2000
  • Top 10 Contributor
8634 solutions 70618 answers

Maybe there is some malware modifying Firefox. Did Webroot find anything else? Could you check with a few other cleaners: Troubleshoot Firefox issues caused by malware.

Maybe there is some malware modifying Firefox. Did Webroot find anything else? Could you check with a few other cleaners: [[Troubleshoot Firefox issues caused by malware]].

Question owner

jscher2000 said

Did Webroot find anything else?

Yes, but I don't remember what the files were called. All I remember is that they were all "relevant knowledge" related.

''jscher2000 [[#answer-1203064|said]]'' <blockquote> Did Webroot find anything else? </blockquote> Yes, but I don't remember what the files were called. All I remember is that they were all "relevant knowledge" related.
jscher2000
  • Top 10 Contributor
8634 solutions 70618 answers

Will Firefox start in its Safe Mode?

Will Firefox start in its Safe Mode?

Question owner

How do you open Firefox in safe mode?

How do you open Firefox in safe mode?
jscher2000
  • Top 10 Contributor
8634 solutions 70618 answers

Adam5 said

How do you open Firefox in safe mode?

If Firefox is not running: Hold down the Shift key when starting Firefox. (On Mac, hold down the option/alt key instead of the Shift key.)

If Firefox is running: You can restart Firefox in Safe Mode using either:

  • "3-bar" menu button > "?" Help button > Restart with Add-ons Disabled
  • (menu bar) Help menu > Restart with Add-ons Disabled

and OK the restart.

Both scenarios: A small dialog should appear. Click "Start in Safe Mode" (not Refresh).

Any improvement?

''Adam5 [[#answer-1203067|said]]'' <blockquote> How do you open Firefox in safe mode? </blockquote> ''If Firefox is not running:'' Hold down the Shift key when starting Firefox. (On Mac, hold down the option/alt key instead of the Shift key.) ''If Firefox is running:'' You can restart Firefox in Safe Mode using either: * "3-bar" menu button > "?" Help button > Restart with Add-ons Disabled * (menu bar) Help menu > Restart with Add-ons Disabled and OK the restart. ''Both scenarios:'' A small dialog should appear. Click "Start in Safe Mode" (''not'' Refresh). Any improvement?

Question owner

Nope, same error pops up... Firefox won't open up no matter what I do.

Nope, same error pops up... Firefox won't open up no matter what I do.

Modified by Computer

Question owner

Webroot has removed everything "relevant knowledge" related from my computer (and I don't blame them), but Firefox wants all those files back. Is relevant knowledge mozilla related? I found their website and webroot does not like it.

Webroot has removed everything "relevant knowledge" related from my computer (and I don't blame them), but Firefox wants all those files back. Is relevant knowledge mozilla related? I found their [http://relevantknowledge.com website] and webroot does not like it.
jscher2000
  • Top 10 Contributor
8634 solutions 70618 answers

Helpful Reply

No, Firefox doesn't require that DLL, something is modifying your Firefox after installation.

No, Firefox doesn't require that DLL, something is modifying your Firefox after installation.

Question owner

As I said

Reinstalling a fresh one works for the first session. After exiting Firefox and starting a new session error pops up again

I reinstalled it again and I am using Firefox right now, but I am not exiting because the error is going to show up until I reinstall it again.

Anyway this error popped up:

''As I [[#answer-1203060|said]]'' <blockquote> Reinstalling a fresh one works for the first session. After exiting Firefox and starting a new session error pops up again </blockquote> I reinstalled it again and I am using Firefox right now, but I am not exiting because the error is going to show up until I reinstall it again. Anyway this error popped up:

Modified by Computer

jscher2000
  • Top 10 Contributor
8634 solutions 70618 answers

Unless you set Firefox up for remote debugging, you shouldn't see that message.

Unless you set Firefox up for remote debugging, you shouldn't see that message.

Chosen Solution

Okay, I solved it. It wasn't Firefox that wanted to run that DLL it was relevant knowledge, it was modifying Firefox the whole time. Turns out it wasn't completely removed by webroot. I uninstalled it now Firefox runs just fine now.

So if anyone else has this problem just know to

  1. go to "C:\Program Files (x86)"
  2. permanently erase the folder called, "RelevantKnowledge"

and Firefox should be running just fine.

Okay, I solved it. It wasn't Firefox that wanted to run that DLL it was relevant knowledge, it was modifying Firefox the whole time. Turns out it wasn't completely removed by webroot. I uninstalled it now Firefox runs just fine now. So if anyone else has this problem just know to # go to "C:\Program Files (x86)" # permanently erase the folder called, "RelevantKnowledge" and Firefox should be running just fine.