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how to remove xvidupdate.com

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when i'm browsing i periodically get a new screen that says i should update flash player, even though it's up to date. my avast software and wot both say this is malware

when i'm browsing i periodically get a new screen that says i should update flash player, even though it's up to date. my avast software and wot both say this is malware

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Have you checked your extensions lately? I suggest disabling ALL nonessential, recently installed, and/or unrecognized extensions here:

orange Firefox button (or Tools menu) > Add-ons > Extensions category

After restarting Firefox, do you notice any improvement?

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DO NOT EVER update any of your software EXCEPT at the web site that created the program. For example, if you want to check a Mozilla program, go to Mozilla. Check a Microsoft program, go to Microsoft. Want to check a plugin, go to that plugin's site. While most warnings you may get are likely to be real, there are web pages that may try to send you a virus by telling you its an update.