Hi R.L. :-)
gtcodec.dll is not a file required by Windows. It is likely a file that has
been added through some 3rd party sofware you have installed, perhaps a
digital camera or some other such software. Apparently the GTCODEC codec is
very badly-behaved and tries to decode formats which it's not designed to
decode and has been causing problems with IE. Try accessing the gtcodec.dll
through Search and renaming it to gtcodec.old to see if that eliminates the
error.
Hope this helps.
Jan

MS MVP - Windows IE/OE [DTS/AumHa]
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>I am unable to watch streaming video because the internal player crashes
>and
> IE must then close down. When clicking on tech data I see this info:
> ppName: iexplore.exe AppVer: 6.0.2900.2180 ModName: gtcodec.dll
> ModVer: 1.10.0.0 Offset: 00006782
>
> Of course this is followed by a few hundred lines of additonal
> codes/numbers/etc. I'v tried emptying cache, temo files, hisory, etc. I
> have
> run Norton virus scan and spyware removers as well. Not sure what else to
> do.
> I am running XP. This problem started about 4 days ago. Also, IE is very
> sluggish. Anyone have this same problem or know what I should do? Thanks.
>
>