Maybe because of your slow CPU the applications in qubes werenât refreshed properly and it failed because of timeout or something.
You can try to refresh the applications manually.
Open the qubes Settings â Applications tab and press on the âRefresh applicationsâ button.
If the machine is slow even when just a few qubes are running then adding more RAM wonât help.
Dom0 takes 4 GB of your RAM and for all other VMs you have only 4 GB available. if youâll use too many qubes and they wonât have enough RAM for them then your system will use swap on disk and this could cause the slowness.