Where within the Internet Explorer installation files can I find the browser error pages?

Question

Is it possible find the default error pages (e.g., bad request, forbidden, not found, gateway timeout, etc.) for Internet Explorer within the installation files or even the Windows 98 CD?

I'm thinking of pages such as this one:

Answer 1

In Internet Explorer 5 (which is the first release with pages in the style shown in your screenshot), the error pages are stored as resources in SHDOCLC.DLL, which is shipped in WIN98_41.CAB on my Windows 98 SE CD; wrestool shows

--type=23 --name='ABOUT.DLG' --language=1033 [offset=0x26300 size=5098]
--type=23 --name='ANALYZE.DLG' --language=1033 [offset=0x34de8 size=8651]
--type=23 --name='ANCHRPPG.PPG' --language=1033 [offset=0x31108 size=2463]
--type=23 --name='BIDIFIND.DLG' --language=1033 [offset=0x2d908 size=8433]
--type=23 --name='DNSERROR.HTM' --language=1033 [offset=0x429e8 size=3726]
--type=23 --name='DOCPPG.PPG' --language=1033 [offset=0x33518 size=5226]
--type=23 --name='ERROR.DLG' --language=1033 [offset=0x276f0 size=4824]
--type=23 --name='FIND.DLG' --language=1033 [offset=0x2fa00 size=5894]
--type=23 --name='FINDINC.DLG' --language=1033 [offset=0x2be80 size=6789]
--type=23 --name='HTTP_400.HTM' --language=1033 [offset=0x3ace0 size=3715]
--type=23 --name='HTTP_403.HTM' --language=1033 [offset=0x3bb68 size=3493]
--type=23 --name='HTTP_404.HTM' --language=1033 [offset=0x3c910 size=3704]
--type=23 --name='HTTP_406.HTM' --language=1033 [offset=0x3d788 size=1928]
--type=23 --name='HTTP_410.HTM' --language=1033 [offset=0x3df10 size=3280]
--type=23 --name='HTTP_500.HTM' --language=1033 [offset=0x3ebe0 size=4842]
--type=23 --name='HTTP_501.HTM' --language=1033 [offset=0x3fed0 size=4821]
--type=23 --name='HTTP_GEN.HTM' --language=1033 [offset=0x411a8 size=4529]
--type=23 --name='IEERROR.DLG' --language=1033 [offset=0x289c8 size=9400]
--type=23 --name='IMAGE.GIF' --language=1033 [offset=0x33098 size=1149]
--type=23 --name='IMAGEPPG.PPG' --language=1033 [offset=0x31f80 size=4370]
--type=23 --name='LINK.GIF' --language=1033 [offset=0x31aa8 size=1239]
--type=23 --name='ORGFAV.DLG' --language=1033 [offset=0x445d8 size=10359]
--type=23 --name='PAGE.GIF' --language=1033 [offset=0x34988 size=1120]
--type=23 --name='PRINTERR.HTM' --language=1033 [offset=0x46e50 size=341]
--type=23 --name='PRINTNF.HTM' --language=1033 [offset=0x46fa8 size=179]
--type=23 --name='PRINTUNK.HTM' --language=1033 [offset=0x47060 size=183]
--type=23 --name='SERVBUSY.HTM' --language=1033 [offset=0x42360 size=1671]
--type=23 --name='SYNTAX.HTM' --language=1033 [offset=0x43878 size=3417]
--type=23 --name='WCEE.HTM' --language=1033 [offset=0x36fb8 size=15655]

(among many others). Resource type 23 is “HTML resource”.

All the resources can be extracted using wrestool or any other resource extraction tool, and the corresponding pages viewed using any browser; here’s Firefox showing Internet Explorer 5’s DNS error page (the same one used in your screenshot):