Alternatively, or in addition to the above fix, you can try registering actxprxy.dll, a process that has improved Internet Explorer 8′s performance for a handful of users.
Click the Start button then search for “CMD.” Right-click cmd.exe and select “Run as Administrator,” then type regsvr32 actxprxy.dll and press return. Quit then re-launch Internet Explorer 8 and check for improved performance.
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