As you see, novice using 2003 and Win 10. I try to open any of several Access databases (all accessing the same folders of small .jpgs), and get 5 messageboxes saying "YourDatabase.mdb doesn't support the format .... .jpg. Try converting to BMP or GIF." Finally, dbse opens with no images.
Before that failure, I'd been working on only one database, doing very ordinary non-image related stuff, saving ordinarily. Failure is only in Access: Word, Photoshop ... everything's happy with .jpg.
This has happened once before. Googled, followed links, no cure found. One, seemingly a Settings backup in Microsoft Office Tools, successful in one case, no use because the OPC file involved didn't exist. Another, Registry H_KEY_CURRENT_USER and _LOCAL MACHINE, looked promising, but not enough info to know what (if anything) needed correction. Novice panic: did a system restore, problem solved.
This time, system restore didn't work; perhaps because, instead of going back to the "problem solved" restore point, I only went back a week, no benefit, cancelled restore, went to "problem solved" restore point, restore unsuccessful.
Grateful for your ideas. And ... any way of fireproofing/setting in concrete these databases under Win10 updates and iffy "cleaners", or shall I go back to XP, where everything was fine for 15 years?