4 GB RAM  is the issue. Newer and Newer versions of windows 10 have more and more and more things running in the background. You will want 16 to 32 gigs of ram because INTEL Graphics will steal up to 2 gigs of ram. Whatever you do use matched pairs of ram. If you plan doing 32 gigs then buy 1 or 2 16 gig sticks. There is no overclocking so XMP wont help this. Current windows needs at least 8 gigs to work properly and with INTEL Video stealing 2 gigs that leaves 6 gigs of ram for windows and the rest is the paging file on the HDD which is horribly slow.  Dual Channel Ram will improve performance quite a bit but you need at least 16gigs to have normal performance. [URL]      
I have a Dell Vostro 3470 Desktop PC (i3-8100 (4 Core); 1 TB 7200 rpm HDD; 4 GB RAM) which is in Warranty (Valid upto Feb 2022). I am highly disappointed by its performance. The PC lags a lot, it does not respond to mouse clicks, Faces difficulties in even single tab web browsing on Microsoft Edge (It is not even able to open Google Chrome ); not able to run a majority of basic applications like MS Word, PowerPoint. I tried many things like scanning for viruses; resetting the OS; uninstalled McAfee Antivirus; Disabled Windows Update; Uninstalled all pre-installed Dell Apps, but nothing worked. The HDD is 90% free but still the PC does not perform.  All Dell Online Troubleshoot videos were to no use. Could anyone suggest what's wrong with my computer? Is it a RAM failure or some kind of hardware failure? Will increasing RAM to 8 GB from 4 GB be of any use? And one point to note, I have been facing this problem since early 2021. It worked perfectly fine as a new device but recently started giving me a ton of problems. Please help me improve its performance. 
Dell Vostro 3470 Running Insanely Slow