Windows 10 lagging - How to fix?

I have Dell Inspiron 5000. Windows 10 Pro version 2004. Core i5-1135g7, 16 GB RAM.

I am a stock trader. So I open up multiple charts on a chart platform and open a trading platform as well. This is when my system starts to lag. Although the task manager shows that both CPU and RAM usage is below 50% at all times. But the system lags so much that it becomes annoying. When I type something, I see the text on the screen after a second. When I click something, I get a response after a second. Right now as I am typing this, everything is almost instant like it should be. This is the most resource-intensive thing that you can say I do on this laptop. Other than this, I only watch YouTube, Netflix and browse sites.

I know for sure that both my charting and trading platforms don't require ridiculous resources. I previously had a MacBook Pro 2017 with 8GB RAM and all was good. Then I moved to HP Probook i7 and 32 GB RAM and everything was smooth there too. Now, on this particular system, this is the issue I am facing.

Now, I don't know if it is the hardware or the software (Windows) issue. I can try and re-install the Windows to see if it helps. My question is, if these platforms were slowing down and making my system lag, shouldn't the task manager show they're eating up a lot of resources? Or can they slow down the system without eating resources? i5 11th gen and 16 GB RAM is more than enough for the tasks I do but still there seems to be a problem on this particular laptop.

Please give me suggestions on how to diagnose the exact problem and fix it.

Hi,

Check the other important resources: the disk where the operating system resides and the paging file. It also checks the use of the graphics card. If even these are below 80% of use then the problem is not the power of the PC but lies elsewhere. Check for any viruses to beware, use malwarebyte and superantispyware. Then if there are no viruses, check the hardware. Then see in the event log if there are any errors and if you do not find anything even try them to update all the drivers (try driverfix). Then there are other things you could check but I'll stop here, for the moment you already have a lot to do.

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I have seen on the net that there may also be problems related to the BIOS (incorrect settings or updates to be done), also some Dell applications can give problems. For example, I am having problems with AMD graphics drivers and an ASUS application.

If the pc is under warranty, contact the support service because they know how to better address you (sometimes)