I get this error message and I'm not sure how to fix it:

In order for the modules included in the package to work correctly, the following files must be writeable by the server. Please change the permission setting for these files. (i.e. 'chmod 666 file_name' and 'chmod 777 dir_name' on a UNIX/LINUX server, or check the properties of the file and make sure the read-only flag is not set on a Windows server)

There are several ways of doing this - through your ftp program, in c panel through the file manager, on a local server with a right click on a files properties - so it depends on your method. Either way you are looking to change the properties of the file. See this FAQ for what should be what, and see this FAQ for what chmod is.

New users should always checkout the following:
1. Documentation - linked on the left. Specifically the administration manual
2. The FAQ section - linked on the left - specifically the sections on gloassry, beginners first steps, modules, blocks and themes. There are links to visual tutorials here.
3. The search function on the top right.
Please check also the read B4U post link below if you have problems.

For Visual tutorials please go here