I have had SLOW saving problems in ALL MS Word documents with just a few lines of plain text, even newly created docs.
e.g. I create new doc, type a sentence, wait 10 seconds for a save. subsequent saves 5 seconds. used to be instant.
I went into options and UNCHECKED "allow background saves' and
voila issue fixed. Thanks for the tip! worked for me. saving is now instant - maybe this is an issue due to upgrade from Windows 8.1 to 10 this year (which generally made my PC faster - a first for Microsoft!).
how to do it: FOR MS office Word 2007 users, click the office button (round colourful icon top left hand corner), at bottom of screen click 'word options' then select 'advanced' and scroll down to the 'save' section.
In general, I would concur that Word remains buggy (well up to my version anyway), and still isn't fully up to the task as well as it should be. Rant continues below...
...bugs I noticed back in the 1990s in Word excel etc never got fixed, and perhaps the single best feature innovation they made - spellcheck - isn't something I have seen improve (although i slavishly have used autocorrect and saved my autocorrect logs
(ACL files) and moved then between computers for decades now). So I use google docs, which is brilliant at suggesting a correction for misspelled words - the engine is very context sensitive/predictive.
(by the way I am using Microsoft Office Word 2007, on a Windows 10 computer with SSD, which is FAST. Still using old MS Office as I could not be bothered learning - confusing - new menu layouts all over again every few years for no benefit, plus I am saving
money I dont need to spend, and security patches are still being issued right up until this week in 2016).