High ram usage while idle on a windows 11 pc

Well +40% is definitely not normal while having just Chrome and few utilities open with 16gb ram.. Have you tried looking at the memory usage on a clean install? (without keeping any of installed programs or files). You can also go to Services (local) by typing "services" on start and disable anything that shouldn't be running, otherwise download Process Lasso to see more in depth or add memory constraints. Be careful with windows services, if in doubt just leave them. Also, 9% GPU usage while idle is not very usual, specially on a gaming laptop. If you aren't watching videos, having games open or loads of widgets it should be around 0% to 3%.

Such noticeable ram issue may persist even if switching back but go ahead and try, just google "windows 10 installation media". How is it you say having just 10 days? Win11 is free forever to former win10 users and vice versa. You can easily just downgrade to win10 while keeping your programs and files, but again I'd recommend doing a clean install, then reinstall whatever you like while looking for what takes that much memory resource. If nothing works you may want to take a look at/replace your ram sticks. If your pc performance is so poor that it doesn't even handle with 3 programs at once then It should even be something else.

I have a relatively new Dell laptop that came with 8gb of RAM and Windows 11. My hard drive SSD has 60% free space. It was running at about about 55% memory in usage idle. After running Windows Update and installing all the updates, it still was using the same 55% of memory. My laptop had an empty memory slot, so I added a 2nd 8gb memory module, doubling the RAM to 16gb. But instead of cutting memory usage in half to 27%, it now uses 33-34% when idle. It seems like Windows 11 is using at least 20% more memory that it should be.

It just measures how much RAM it should use. With 16 gb ram windows 11 becomes faster, because it stops to save ram. Instead, it eats much ram without any problem. Devs should do something, I don't want to have 64 gb ram to just run Windows 11. Less likely they are gonna do something with this. They'll just forget about it like dream. No one cares about optimization in present, sadly.

Same problem here, 16GB laptop, Windows 11, memory usage is above >50% after restart.

Even summing up all the processes in Task Manager doesn't add up anywhere close to 50%

On board GPU disabled in BIOS in favor of the discrete GPU.

That is what happened to me recently, I added ram to my desktop. Mine came with 16GB, I added an extra 8GB to make it 24GB, and my usage hasn't changed much and it seats around 45% with chrome opened with 3 tabs and Microsoft teams running in the background.
Performance wise it does feel fine, especially because I used to have my computer slow for a hot second randomly before, and now after increasing the ram that problem hasn't happened. So Windows 11 will use as much ram as it can.