How can I change my firewall settings back? Whats a group policy?

"Group Policy" are rules that are defined for certain "Groups"; The easiest thing to do is explain where you can view the groups and what each group can do. Unless you specifically override a rule defined under Group Policy, then certain "rules apply" hence, Group Policy. Go to Control Panel ->Administrative Tools ->Computer Management. When Computer Management opens, you'll see a tree on the left hand side. Click on "Users and Groups." Then click "Groups". The pane to the right will then show all the "Groups" on your computer. To the right of each group, is a description of what each group can or can not do. Unless you specifically permit a group or individual in a group additional priviledges, the groups are controlled by the policies as noted. The second part of your question "System Administrator" Is it you? I don't know. With what name do you log on as? Is the User Name you log on with "Administrator"? If it's not then no, you are not the system administrator. Added users can be given administrative priviledeges, but it does not make them the "System Administrator." To enable System Administrator (providing you aren't logging on as Administrator or see it under User Accounts), Control Panel ->Administrative Tools -> Local Security Policy. A window opens; on the left side you'll see a tree with various settings/functions. Expand Local Policies. Click "Security Options". In the right pane, the very top option reads "Accounts: Administrator Account"..... Disabled. Double click that line. A window opens. Select "Enable" and click OK. Your System Administrator account can now be logged onto. By default, the System Administrator does not have a password. So if you logged off and clicked on Administrator, a password would not be required. You can obviously add a password. Hope this helps.