I wasn't getting 100% disc use but disc full. Turned out to be Apache error report logs. I don't know when Apache got downloaded but removing it completely gave me 67Gb disc space. . At present I have 6 tabs open without any problem.
I'm using Norton Internet Security on my laptop with Win 10 upgrade., Norton used to be terrible about 5 ~ 6yrs ago but 'they' did something a few years ago so it doesn't slow things down or hog processor so much. The laptop was originally running Vista when I first bought it (around 2008~2009) It isn't the latest greatest Intel chip with a ton of memory. (3Gb)