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.
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Try an alternate browser such as Chrome.  

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.

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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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You can also use Hitman Pro http://www.surfright.nl/en to scan your system for any mallware, spyware, etc.
ksfokAuthor Commented:
Download SurfRight for free and use it without risk?
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.
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......
ksfokAuthor Commented:
1. IE8
i recommend spybot and MBAM- very trustworthy, i use them for years; but it's your choice..
Just something more simple first before donwloading any anti-malaware, spyware tools.

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Windows 7

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