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Browser will no longer allow me to access sites I access all the time

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I am trying to access various websites that I accessed just 12 hours ago, and I am being told I can not due to either content issues - such as the site being considered porn by my browser, or because the IP Address is Uncategorized. I checked to see if I had a faulty Windows Update to explain this, and while there was a security update 12 hours ago, it was listed as successful. How can I access my websites again?

I am trying to access various websites that I accessed just 12 hours ago, and I am being told I can not due to either content issues - such as the site being considered porn by my browser, or because the IP Address is Uncategorized. I checked to see if I had a faulty Windows Update to explain this, and while there was a security update 12 hours ago, it was listed as successful. How can I access my websites again?

Chosen solution

I discovered the filter was also affecting my Kindle. I contacted the ISP, and discovered they had made a mistake on their end. The problem is now resolved. Thank you for your response though.

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The filter is calling itself "Secure Computing Smart Filter web gateway security" According to Google this is a McAffee related software - and I am not running any McAffee software.

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It could be the work of one of your add-ons, or even add / mal-ware. Look thru your add-ons list and make sure you know what each one is there for. Also, check the programs that are on your computer Windows > Start > Control Panel > Uninstall Programs. (Mac: Open the "Applications" folder) Go thru the list and use a web search to check any that you don't know what they are.

Troubleshoot Firefox Issues Caused By Malware {web link}

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Chosen Solution

I discovered the filter was also affecting my Kindle. I contacted the ISP, and discovered they had made a mistake on their end. The problem is now resolved. Thank you for your response though.