I assume that you are having trouble logging into forums, and that your laptop is working fine, AND that you are on another computer now, since you appear to be logged in.
Without knowing what operating system or browser you are using on the laptop, it is hard to be specific, but all browsers have 'options' or 'preferences' where these things can be adjusted. These are accessed from the menu bar. You will have to check each dropdown to find where yours is.
Once there, you look around for 'cookies' and there will be an option to accept all cookies, etc. etc. Accepting all cookies is OK for most people. Some hate being tracked around and that is why you can turn it off. Unfortunately sites like this use cookies to remember you from page to page and you'll be logged out if you don't have them at least partially enabled.
As for the password, most sites have a password recovery mechanism at or near the login, and it is usually presented when you fail to get in.