Lacking sufficient detail in your post (i.e. what are the requirements
that do not match? What make/model PC/NIC?) I can only suggest you
purchase a newer computer or a newer wireless NIC or connect to the
network via a patch cable.
Choose an encryption scheme that matches the requirements of both the
wireless router and the wireless adapter in your computer. If you need
more help, please read the information at the following link first so
you will know what details to include in your next post: