This most of the text and solutiuns was get from Vindrivers.Com . I put in this link to avoid the difficultness of extract the file sense you only want to get the file MSHTML.DLL from it. If you need to get another languish than Swedish or English please go to this page and follow the tips (at least) below B.

I use Winzip (8.0) to extract it instead of the suggested solutions. That was a lot easier ;-)

MS IE 5.5 SP2 + 6.0 Fix
As you may [or may not :)] know, Microsoft recently released yet another MS IE upgrade, Internet Explorer 5.5 SP2 [build 5.51.4807.2300] 32-bit for Windows 9x/NT4/2000/ME, which fixes lots of BUGs and security vulnerabilities/risks.
Therefore it is STRONGLY RECOMMENDED to install it, if you work in MS Windows 95, 98, ME, NT 4.0 or 2000 (ANY version).
If using Windows XP or 2002 (ANY build) DO NOT install MS IE 5.5 SP2, because these OSes include the new MS IE 6.0, which BTW, "features" the same BUG.
... And now that you have installed IE 5.5 SP2 or are using WinXP/2002 + IE 6.0, all is well, or at least it seems like it is, and you probably congratulate yourself for swatting swarms of Microsoft BUGs, or/and brag to all your friends/coworkers that you own the coolest MS OS to date. :)
NOT so: that is until you try to view ANY Internet based Quick Time Movie (QTM) flic (usually in .MOV format), even if you have installed the Apple QTM Codecs, Movie Player, Pic Viewer + Plugins Standard Edition 5.02 32-bit for Windows 9x/NT4/2000/XP [9.3 MB, free] (current as of this writing). Oops! All you see is a browser/plugin error message and/or a "not found" graphic pic instead, and that darn movie doesn't want to play. :(
But wait, there are 2 FIXes. :) First goes...
  1. Apple QTM FIX [applies to ALL Windows 9x/NT4/2000/ME/XP/2002 users]:

    Go to this Apple QTM ActiveX Check page, to install the small QTM ActiveX Plugin OCX fix. This is done automatically if any release of MS IE 5.xx or 6.xx is detected.
    More info.
    But there is still another BUG "alive" in your "shiny" new browser: BOTH MS IE 5.5 SP2 and 6.0 also REMOVED support for ALL Netscape style browser plugins that are NOT ActiveX enabled, otherwise available if using MS IE 5.5 SP1 [build 5.50.4522.1800] or ANY other OLDER MS IE release.

  2. Next FIX [applies ONLY to Windows 95/98/ME users]:

    There is where the second FIX comes in. :)

    This may also work with Windows NT4/2000/XP/2002 by altering some of these steps, because these MS OSes do NOT have a native MS-DOS mode, but I haven't tried. Do it at your own risk.
    If using Windows 95/98/ME + MS IE 5.5 SP2 (I haven't tried this with any MS IE 6.0 build):

     

    1. Download this Swedish MSHTML.DLL or this English one [build 5.50.4616.200], a newer version than that one installed by MS IE 5.5 SP2 Setup.
      For details about this MS IE patch go to this MS TechNet page.
      More info @ MSKB.
    2. Save the file to a locations of your own, by typing in a path name in the dialog box that follows.
      MSHTML.DLL, will be used here to replace the newer one, located in C:\Windows\System (default Win9x/ME setup folder used in these examples).
    3. Backup your newer C:\Windows\System\MSHTML.DLL file to a safe location BEFORE replacing it!
    4. Now move your saved (older) MSHTML.DLL to C:\Windows\System, by opening Explorer or Utforskaren and
      move the old MSHTML.DLL to C:\WINDOWS\SYSTEM and say Yes when prompt if you want to replace the newer with the older.
    5. Finally, reboot or restart Windows !
    6. Done. :)

From now on enjoy your restored MS IE compatibility with ALL current (and future) Netscape style browser plugins, just as you used to.

BTW: It is recommended to install the Apple QTM ActiveX Plugin Patch anyway, in case you decide to upgrade your MS IE build in the future, because it is likely that Microsoft will not bring back Netscape and/or QTM plugin support to upcoming Internet Explorer releases. :(
It is also likely that some 3rd party Netscape-only style plugin developers will add MS IE ActiveX compatibility to their future releases, but I wouldn't count on that.