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Wireshark not responding while capturing packets

Hi, for a long time I used Wireshark without problems but from a while it became very frustrating using it.

When I start a capture I don't see any problems and packets being captured are shown without problems, I can see TCP, NBNS, DNS and other traffic but when I, for example, open a browser and search for a website Wireshark begins to slow down till crashing with Windows saying that the program is not responding.

Obviously I analyzed ram usage and I saw very high values (I have a 4GB machine underneath).

I use npcap as a capture driver and obviously I tried to uninstall and reinstall Wireshark without solving anything.

Is there a solution for this problem? Do I need a ram upgrade in order to use it?