CPU using 100% for browsing

I was scrolling a long list of tweets in Twitter and found my CPU using 100% for browsing. No update can be done. How can I fix that so the CPU usage will decrease to allow update?
My box is runnign WIN7 pro.
Thanks.
ksfokAsked:
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top_rungCommented:
Try an alternate browser such as Chrome.  

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JohnBusiness Consultant (Owner)Commented:
At this point, you need to get a really good antivirus and scrub for malware. My Windows 7 Pro box browses at about 5% CPU.

Try to open Task Manager and see under Processes (Tab) what is taking all the CPU. Start there and let us know, but my guess is you got hosed with a virus.

Malwarebytes is a commonly suggested approach here.

 ... Thinkpads_User
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nobusCommented:
i recommend running both :
     Spybot :        http://www.download.com/3000-8022-10122137.html
http://www.malwarebytes.org/mbam.php                         MBAM

you can also check if it happens in safe mode with networking too
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bright12Commented:
You can also use Hitman Pro http://www.surfright.nl/en to scan your system for any mallware, spyware, etc.
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ksfokAuthor Commented:
Download SurfRight for free and use it without risk?
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bright12Commented:
You can download it for free and it is without any risk. You need to keep in mind that the free version is only functional for a month.
But should be enough for most cases.
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realdreamsCommented:
1. Which browser?
2. cpu still 100% with browser closed?
3. cpu 100% only with certain pages open in this browser?
4. tried other browsers like chrome/opera?
5. if problem goes away with another browser(I assume you are having problem with IE8), upgrade to IE9 and disable BHOs with autorun(http://technet.microsoft.com/en-us/sysinternals/bb963902)

btw your question lacks details which makes it hard for others to troubleshoot....... interestingly this question is filled with anti-virus/anti-spy software recommendations......
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ksfokAuthor Commented:
1. IE8
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nobusCommented:
i recommend spybot and MBAM- very trustworthy, i use them for years; but it's your choice..
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MichaelAttardCommented:
Just something more simple first before donwloading any anti-malaware, spyware tools.

Clear History cookies cache and at that you can remove from your browser.
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