Recent answers to Firefox won't work on new HP Windows 10 computerhttps://support.mozilla.org/en-US/questions/12235142018-06-30T19:22:14-07:00I'm using McAfee, but I'll see if I can find settings in it as described in that article. Meanwhile,2018-06-30T19:22:14-07:00mwhetstonehttps://support.mozilla.org/en-US/questions/1223514#answer-1128354<p>I'm using McAfee, but I'll see if I can find settings in it as described in that article. Meanwhile, ice installed an older version of Firefox that is working.
</p><p>Thanks for the help.
</p>I'm using McAfee, but I'll see if I can find settings in it as described in that article. Meanwhile,2018-06-30T19:20:15-07:00mwhetstonehttps://support.mozilla.org/en-US/questions/1223514#answer-1128353<p>I'm using McAfee, but I'll see if I can find settings in it as described in that article. Meanwhile, I've installed an older version of Firefox that is working.
</p><p>Thanks for the help.
</p>hi, thanks for reporting the problem, so far we have heard about this from avast/avg users whose sec2018-06-27T17:44:36-07:00philipphttps://support.mozilla.org/en-US/questions/1223514#answer-1127432<p>hi, thanks for reporting the problem, so far we have heard about this from avast/avg users whose security software is meddling with encrypted connections. firefox 61 introduced the better security protocol tls 1.3 &amp; apparently avast can't cope with that yet.
</p><p>as a workaround, please try to disable the scanning of https connections as described in <a href="https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message#w_avast-and-avg-security-products" rel="nofollow">https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message#w_avast-and-avg-security-products</a>
</p>Hi, try it this way and get the full installer : uninstall Firefox. Then Delete the Mozilla Fir2018-06-27T09:53:48-07:00Pkshadowhttps://support.mozilla.org/en-US/questions/1223514#answer-1127316<p>Hi, try it this way and get the full installer&nbsp;: uninstall Firefox. Then Delete the Mozilla Firefox Folders in C:\Program Files , C:\Program Files(x86) &amp; C:\ProgramData
Then restart system. Then run Windows Disk Cleanup. (Note: This should be Pinned and run Weekly, If never done below expect 10's of gig's)
Then run it again and click the button that says Cleanup System Files. Note: your Firefox Profile is saved. But you should make a back up before you do&nbsp;:
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<ul><li><a href="https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles" rel="nofollow">https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles</a>
</li><li><a href="https://support.mozilla.org/en-US/kb/export-firefox-bookmarks-to-backup-or-transfer" rel="nofollow">https://support.mozilla.org/en-US/kb/export-firefox-bookmarks-to-backup-or-transfer</a>
</li></ul>
<p>Reinstall with Current Release Firefox 61.0.0 with a Full Version Installer
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<ul><li><a href="https://www.mozilla.org/firefox/all/" rel="nofollow">https://www.mozilla.org/firefox/all/</a>
</li></ul>
<p>Please let us know if this solved your issue or if need further assistance.
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