First off I have to tell you that you can remove half your memory as the version of windows 7 you have cannot use more then 4mb of Ram.
this why it reports Available OS Memory: 3064MB RAM
Details of all windows releases and ram limits is below
Now the error you are getting is unusual for swtor to say the least.
From your Diag, you know you have 2 active sound cards ? Realtek and sound blaster , conflict maybe a possibility.
In the first instance can you do a clean boot and see if this crash still occurs http://support.microsoft.com/kb/929135
The most common cause of the "memory could not be read error" is normally another program interferring.
programs like mumble as an example have done this in the past.
It is worthwhile doing a chkdsk c: /f and a sfc /scannow with a command prompt as administrator.
if errors are found swap your memory sticks around you have an un-used set in there already