my computer is running extremely slow

1. https://support.apple.com/guide/mac-help/if-your-mac-runs-slowly-mchlp1731/mac
2. If this doesn't help

      Download EtreCheck, run it to see if there is any adware installed or not.

      https://etrecheck.com

      Click  “Free download” button,

      Open Downloads folder, click on it to open, and then select ”Open”.

      “Choose a problem” from the popup menu box, and then “Start EtreCheck” in the dialog.

      Click “Share Report” button in the toolbar, select “Copy report” .

      Paste the report when you reply.

      Note: This is a diagnostic test.