Question for those more knowledgeable than myself. My wife’s computer has 4 gb of ram,
Do you know what type of RAM it takes? DDR2, 3, 4? Laptop or desktop? Was it ever upgraded before?
If you don't know, post the model of the system and I can probably find it.
Some laptops are unfortunately very difficult to upgrade RAM on.
and she’s basically maxing it out from her normal usage (without doing much, it’s showing ~3.8 gb being used), and things have been running quite slow. I was going to upgrade it, but the other issue is web browsers are taking an unusually long time to load a page (not an issue on any other device in the house).
Windows 10? A base install of 10 with a few normal programs running tends to take up 2 - 2.5GB or so at idle.
Depending on how many tabs open the browser usually between 300MB and 1GB. I have 32 tabs open and my browser is taking about 1.5 GB right now.
If you aren't sure, take a screen shot of the processes tab (sorted by memory) of task manager and we can see what's using how much RAM.
While 4GB is a little thin these days I still find it workable on my laptop with only 4GB for just general internet usage. So I'm guessing there might be some fat that can be trimmed in terms of what programs launch at startup.
Would it make sense that the web browser is being slow as a result of the lack of ram?
Most likely.
When you are near maximum capacity on RAM the system will dump more data on to what's called the page file which is located on the hard drive. Hard drives are much slower than RAM, even SSDs are slower by a significant amount. So you're essentially using that much slower hard drive as overflow RAM.