Set up a Guest Share in Windows 7

Share from Any Folder
1. Enable the guest account. By default, the guest account is disabled to protect your computer against unauthorized access. To enable the account, press the Windows key on your keyboard to expand the Start menu, click 'Control Panel' in the right column and type 'guest' in the search box in the upper right corner of the Control Panel window. Click 'Guest' and 'Turn On' if it is disabled.
2. Select a file or folder to share with the guest account. Press 'Windows-E' to open an Explorer window. Navigate to the asset you wish to share. Right click on the file or folder, select 'Share with' from the context menu and then click 'Specific people....'
3. Review the user accounts that currently have access rights to the asset. If the guest account is already authorized to access the file or folder, the account name and permission level will display in the dialog box.
4. Add the guest account as an authorized user. From the drop-down menu at the top of the dialog box, select 'Guest,' then click 'Add.'
5. Customize the guest user's access rights. From the 'Share with' dialog box, click the drop-down next to the guest user's access level. Select either 'read' (to only allow the guest account to view the file or folder) or 'read/write' to let the user edit the asset. Select 'remove' to strip all rights to the asset.Click 'OK' when you're finished to set the guest account's permissions.
Share Using Public Folders
6. Enable the guest account. By default, the guest account is disabled to protect your computer against unauthorized access. To enable the account, go to 'User Accounts' within the Control Panel and select 'Manage Accounts.' Click on the guest account and enable it if it's disabled.
7. Put the file you want to share with the guest user in the computer's Public folder (usually found at C:\Users\Public).
8. Log in using the guest account to verify that you can see the shared asset in the Public folder.