Re: Log in
If you’re using IE. then go to Tools, internet options (at bottom) and make sure the ‘delete browsing history on exit’ is not ticked.
Also in the security tab, set it to ‘medium-high’, same in the privacy tab.
I assume you’re using an Anti virus program, so if none of the above makes any difference then make sure the AV settings are not deleting cookies.
I know it’s not simple if you’re not a PC techi type, but you persevere and you’ll get there.