Just a comment on the CD/DVD drive's drivers. There are no drivers for CD/DVD drives (any optical drive) other than the built in Windows drivers.
Second, considering the age of an Inspiron 531 it may just be the drive is defective (laser light) and replacing it with a new drive is a viable option. Those PC's came out at the end of Windows XP/start of Vista. Optical drives are relatively inexpensive and if you have a 531 and not a 531S it will accept a standard SATA optical drive. A new drive can be purchased for $20 to $25 at www.newegg.com
If its a 531S it still accepts a full size optical drive but it mounts vertically so you need one that is designed to be operated (and hold the disc) vertically.