If memory is the problem, then your RAM sticks are bad. What you can do is find out what sort of RAM you require and buy some new RAM. The best place i have found for finding what RAM you will require is here
This will show you what your laptop currently has and what ou require to upgrade it.

Is your CD-Drive a Burning CD-Drive? You can tell by looking on the front of the CD Drive for a label showing the Compact Disc logo with "ReWritable" written underneath. If you cant see this anywhere, your
CD-Drive cannot burn CD's. To solve this you will need to purchase a new CD Drive or even consider a DVD Drive that is ReWritable.
Hope this helps.

Yes it is a burning CD Drive