There used to be a bug in ms word (idk if it's still there, it's been years since I last used any ms office app) where, if you had a separate printing server connected to a printer, and the printer was off but the server was online, it would try to fetch printer features, resulting in an unanswered request that would end up timing out. For some reason, word would completely freeze until the request timed out at 30s. No input worked, screen didn't refresh, window controls didn't work either. Completely frozen. And the worst part was that word would try to fetch printer features every time you clicked completely unrelated buttons. Want to export to PDF? Frozen for 30s. Want to save your document with a different name? First wait for 30s. Oh, you want to change the page size? You guessed it, 30s frozen.