How do I know if security alerts on my PC or fake?

THEY POP UP IN STRANGE PLACES AND I HAVE NOT CHANGED A THING. THEY CONSTANTLY ARE WANTING TO INSTALL UPDATES AT TIMES AN PLACES I HAVE NEVER SEEN BEFORE? I HAVE YAHOO ONLINE PROTECTION? I HAVE BEEN USING THIS NEW PC OVER A YEAR AN THIS IS A NEW OCCURANCE?

Best Answer

my advice, if it "pops up" do NOT do anything with it. instead, go to your virus scan or firewall software directly to do updates and perform scans. if you do that regularly, then you'll be fine.
same is true with emails, no matter who they are from never use the link they give you. for example if ebay sends something and say we need you info updated, do not click the link, go to ebay directly and update yourt info there. other wise you may be giving the wrong person your info.

Your PC may be infected with adware. Use these scans to remove it. Both are free and safe to use.

Spybot - Search & Destroy detects and removes spyware, a relatively new kind of threat not yet covered by common anti-virus applications. Spyware silently tracks your surfing behaviour to create a marketing profile for you that is transmitted without your knowledge to the compilers and sold to advertising companies. If you see new toolbars in your Internet Explorer that you haven't intentionally installed, if your browser crashes inexplicably, or if your home page has been "hijacked" (or changed without your knowledge), your computer is most probably infected with spyware. Even if you don't see the symptoms, your computer may be infected, because more and more spyware is emerging. Spybot-S&D is free.
http://www.spybot.info/

http://superantispyware.com/
SUPERAntiSpyware is the most thorough scanner on the market. Our Multi-Dimensional Scanning and Process Interrogation Technology will detect spyware that other products miss! SUPERAntiSpyware will remove ALL the Spyware, NOT just the easy ones!
Easily remove over 100,000 pests such as SmitFraud, Vundo, WinFixer, SpyAxe, SpyFalcon, WinAntiVirus, AntiVermins and thousands more!

If you have Windows XP, the only security alerts you should be getting is when MS tries to download and install updates. If you are getting what you call "security alerts" you have spyware and need Ad-Aware and SpyBot.
http://www.download.com/3000-2144-10045910.html

Get SpyBot Search & Destroy to safely remove spyware. Best of all, it’s free. After installing it, immunize the computer against over 16,000 known pieces of spyware. Then run a full bot check and remove everything it finds using the Fix Selected Problems tab. Keep it updated and run it weekly to keep your computer free of this stuff. I’ve used it for 3+ years and depend on it to find the stuff that hides in your computer and causes major problems.
http://www.safer-networking.org/

Run Ad-Aware the first time doing a Full System Scan. Thereafter, run a Smart Scan daily.

Keep them both updated and use them weekly.

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