I have 2 computers that are in the same workgroup. One in my room(1), one in the office(which is in the house)(2). From the computer 1 I can take files from computer 2 and print on its printer. Yet from computer 2 it will not let me access computer 1.

It says:

You may not have permission to access this network resource. Contact the administrator of this server to find out if you have access permissions.
Logon failure the user has not been granted the requested logon type at his computer.

PLEASE HELP!

Assuming that all of your computers are members of the same Workgroup and that File and Printer sharing is enabled on all computers:

When networking with a Workgroup, each computer maintains their own permissions. This means that you must assign permissions to the shares or resources individually on each computer. For example, your computers are named ONE and TWO and you have the user JOE on ONE and JANE on TWO.

On a share on computer ONE you would have to add permissions for TWO\JANE and for a share on computer TWO, you would have add permissions for ONE\JOE. You can also use the builtin groups such as ONE\USERS or TWO\ADMINISTRATORS for your permissions. Also keep in mind that these are Share permissions. You also have to allow for File and/or folder permissions. Right-click on the file or folder and select Properties and Security. You must add the users that have permissions. Each user may be a member of a group and would inherit permissions through that group membership. So, you would add ONE\JOE to TWO\USERS group and add TWO\JANE to ONE\USERS group (or you may want them to be Administrators instead).

Maintaining permissions by group inheritance is much easier than by changing permissions for every file, folder or share.