Thanks again Major Payne for all of your help. I really appreciate it.
Of the dll's the microsoft message window mentioned, I was able to successfully register this group:
browseui.dll
dxtmsft.dll
imgutil.dll
jscript.dll
mlang.dll
mshtml.dll
mydocs.dll
msi.dll
ole32.dll
oleaut32.dll
rpcrt4.dll
rsabase.dll
rsaenh.dll
schannel.dll
shdocvw.dll
urlmon.dll
wintrust.dll
This next group of dll's would display the message " '....dll' was loaded, but the DLLRegisterServer entry point may be exported, or a corrupt version of '....dll' may be in memory. Consider using PView to detect and remove it."
(note: '....dll' signifies the particular .dll I was trying to register at the time)
browselc.dll
crypt32.dll
comctl32.dll
gdi32.dll
imm32.dll
kernel32.dll
msls31.dll
mswsock.dll
msoss.dll
msvcrt.dll
msafd.dll
netapi32.dll
netbios.dll
rnr20.dll
shdoclc.dll
shfolder.dll
shell32.dll
shlwapi.dll
user32.dll
version.dll
wsock32.dll
ws2_32.dll
ws2help.dll
winmm.dll
wininet.dll
This last group of .dll's would display the message "LoadLibrary ("name of dll") failed. GetLast Error returns 0x00000485," when I'd go to register them.
advcpi32.dll
boclean.dll
msonsext.dll
I then reset to the Default settings in Internet Options under the Privacy and Advanced tabs, and then closed/reopened IE. Went back to yahoo email, and the browser displayed the message about it encountering a problem needing to close again

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And thank you bobbilc for taking the time to register and offer your help, too (sorry to hear that you're having a similar problem). I had actually tried doing the repair explorer option a little earlier this week, but it didn't seem to do anything in this particular case. Thank you though, for taking the time to offer a suggestion. The more ideas that are offered, the better

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