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:
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)
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.
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
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