First of all I have to specify I'm using an old system, Windows XP on a Frankenstein desktop machine. My laptop, if the friend ever gets it re-programmed, is almost as antique, a third-hand Sony Vaio given by a grateful student; also XP. Due to the exigencies of surviving on a pension with respiratory failure, no upgrades are likely soon.
In general I often have difficulty with caches getting too full. Even Facebook goes wonky after a few hours, and I can't use the video feature on my tutoring site, too bad as face-to-face is useful. Any computer folks out there who know how to improve memory and speed with few resources, please do tell.
In particular, when I am answering something on Stack Exchange and the answer takes a lot of typing and many symbols, the system chokes up. It gets longer and longer responding and the mouse seems "sticky". After a while there's no response at all. Now on other sites, when this happens I curse and throw things because if I haven't saved my work it's all lost at that point. On SE, wonderfully, when Chrome shuts itself down and I have to re-start and restore pages, all my work is still there. Great!
But is there any way to avoid this that can be managed with no money or other resources?