Try this:
  1. Using your mouse, highlight everything within the following box, then press [Ctrl]-[C], (or click Edit | Copy), to copy what you've highlighted to memory (the clipboard):
    Code:
    for %x in (browsewm cabview cdfview clbcatex clbcatq) do regsvr32 /s c:\windows\system32\%x.dll
    for %x in (datime dfsshlex iepeers ils lmrt) do regsvr32 /s c:\windows\system32\%x.dll
    for %x in (mmcndmgr mmcshext mshtmled netcfgx netshell) do regsvr32 /s c:\windows\system32\%x.dll
    for %x in (ntmssvc oleacc photowiz stobject zipfldr) do regsvr32 /s c:\windows\system32\%x.dll
    regsvr32 /s c:\windows\system32\mmc.exe
    exit
  2. Close Internet Explorer.

  3. Click Start | Run type in
    cmd
    and press [Enter].

  4. In the cmd window, right-click any blank area and then select Paste.

  5. You'll see a slew of commands scroll down the screen. When it gets to the last line, ("exit"), simply press [Enter] to close the cmd window.
Now reload Internet Explorer and try [Ctrl]-[F], (or click Edit | Find on this Page...), to see if it's working.