System has slowed down

Lately my iMac has slowed considerably and sems to hang up often when merely opening Yahoo or any website. It is not a download issue.
I get the little rainbow wheel that pops up and turns forever and sometimes I cannot get online at all after it begins. Even opening this forum took about 20 seconds as the wheel rotated and waited and waited.
I am using Lion and it is updated. It happens in Safari opr Firefox or even in opening email. I have repaired disk permissiomns often, I clean with "CleanMyMac" on a regular basis but at times I have to simply restart the system whjich does not always solve the problem.
Any ideas how to solve this issue with the little rainbow wheel and inability to open pages?

The OP is using Snow Leopard (per his profile), your instructions assumr he is on Lion (10.7.x) therefore they will not work.
To the OP: Insert either the original OS X Install Disc that came with the machine or your Snow Leopard upgrade DVD into the SuperDrive. Then restart the machine, when you hear the startup tone hold down the Option key - choose the DVD - Select the language - Click the Utilities Menu - Select Disk Utility - Repair HD until no errors appear - Repair Disk Permissions - Quit Disk Utility - Quit Install - Restart computer.

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  • After loading mavericks on MacBook Pro (mid2010 i7) the entire system has slowed considerably?

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    Thanks Ram

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  • My computer has slowed down, my computer has slowed down,any ideas on how to speed it up

    My MAC has slowed down,any ideas on how to speed it up?

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    a lot more ways to fix your Mac.
    http://www.thexlab.com/faqs/faqs.html
    Look at what is happening with your Mac when you run Activity Monitor.
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    "Reading system memory usage in Activity Monitor :"
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    See   Kappy
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      SharePointBrowserPlugin: Version: 14.0.0 Support
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      Flash Player: Version: 15.0.0.152 - SDK 10.6 Support
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      AppleAVBAudio: Version: 203.2 - SDK 10.9
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      Flash Player  Support
      MacFUSE  Support
      Tuxera NTFS  Support
    Time Machine: ?
      Time Machine not configured!
    Top Processes by CPU: ?
          5% Safari
          3% WindowServer
          2% BitTorrent
          2% hidd
          0% softwareupdated
    Top Processes by Memory: ?
      229 MB Safari
      160 MB softwareupdated
      156 MB com.apple.WebKit.WebContent
      135 MB com.apple.IconServicesAgent
      102 MB VLC
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      1.55 GB Active RAM
      1.52 GB Inactive RAM
      895 MB Wired RAM
      628 MB Page-ins
      0 B Page-outs

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  • Since installing Maverick, speed has slowed down considerably. Not able to export photos form email to iphoto. What is going on?

    Since installing Maverick, speed has slowed down considerably. Not able to export photos form email to iphoto. What is going on?

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  • I seem to be having an issue whenever I open up a new page other sites keeping appearing and the pc has slowed down to a halt. What should i do to restore back to normality?

    I foolishly opened a free online movie site and since then my pc has slowed down and i keep getting other sites popping up constantly.
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    There is no need to download anything to solve this problem.
    You may have installed one or more of the common types of ad-injection malware. Follow the instructions on this Apple Support page to remove it. It's been reported that some variants of the "VSearch" malware block access to the page. If that happens, start in safe mode by holding down the shift key at the startup chime, then try again.
    Back up all data before making any changes.
    One of the steps in the article is to remove malicious Safari extensions. Do the equivalent in the Chrome and Firefox browsers, if you use either of those. If Safari crashes on launch, skip that step and come back to it after you've done everything else.
    If you don't find any of the files or extensions listed, or if removing them doesn't stop the ad injection, ask for further instructions.
    Make sure you don't repeat the mistake that led you to install the malware. It may have come from an Internet cesspit such as "Softonic" or "CNET Download." Never visit either of those sites again. You might also have downloaded it from an ad in a page on some other site. The ad would probably have included a large green button labeled "Download" or "Download Now" in white letters. The button is designed to confuse people who intend to download something else on the same page. If you ever download a file that isn't obviously what you expected, delete it immediately.
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    In the Security & Privacy pane of System Preferences, select the General tab. The radio button marked Anywhere  should not be selected. If it is, click the lock icon to unlock the settings, then select one of the other buttons. After that, don't ignore a warning that you are about to run or install an application from an unknown developer.
    Still in System Preferences, open the App Store or Software Update pane and check the box marked
              Install system data files and security updates (OS X 10.10 or later)
    or
              Download updates automatically (OS X 10.9 or earlier)
    if it's not already checked.

  • Downloading Aperture has slowed down photo editing on my iMac.  Should I delete iPhoto?

    Downloading Aperture has slowed down photo editing on my iMac.  Should I delete iPhoto? 

    So it was only the initial preprocessing after an import of a complete library. If your system drive is nearly full, you should expect performance problems. Try to free at least 20% of your drive.
    I would try to keep your iPhoto Application - it is only 1.1 GB and you may need it later; but you can safely delete the iPhoto Library once you are sure, you imported it successfully. iPhoto can do some things Aperture cannot - e.g. greeting cards, calendars. And it is always nice to have a second application for testing purposes, if something should go wrong.
    But make a backup copy of the iPhoto Library, just in case. Sometimes you will notice years later that a single image not imported correctly, and then you will be glad you still have a backup of the original iPhoto library.
    Regards
    Léonie

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