Hello Good People of the Forums:
It's been a long time since I've had a problem that I couldn't solve myself so I'm turning to my usual source of information.
I am having a real problem getting a program default association to stick. Some background:
Some time ago I switched from Windows Live Mail to Thunderbird. I did this because WLEM would only send pictures in batches which no one on the receiving end could open. (I never could figure out how to send each photo as a separate attachment in a single e-mail) Thunderbird worked fine until my latest O/S reinstallation, (I do this twice a year when I notice little glitches in Windows 7 i.e. blank windows appearing when I reboot, strange messages informing me that files could not be found when they have been found and loaded, etc.) After reinstallation of the O/S, Thunderbird worked fine for about two days then all of a sudden any links embedded in the e-mails would not work. According to Mozilla the problem was in the default associations. Sure enough, the default association showed there was no program associated for HTML or HTM apps. I set Thunderbird as the default program but it will not stick. As soon as I close the association page it goes back to no association.
I can work around it but it is a real pain in the rump. I have Micosoft Outlook (I guess this is a new app from MS that replaces HotMail) on my favourites tab and after getting an e-mail with a link in Thunderbird I have to load Outlook and import the e-mail to activate the link.
I would appreciate any suggestions you may have.
P.S. I don't want to run a system restore because that would mean I would have to reinstall all the programs and files that installed after reinstalling the O/S.