Dell OptiPlex NX User Manual page 33

may return software for refund or credit only if the sealed
package containing the diskette(s) or CD(s) is unopened.
Returned products must be in as-new condition, and all of
the manuals, diskette(s), CD(s), power cables, and other
items included with a product must be returned with it.
This "Total Satisfaction" Return Policy does not apply to
DellWare products, which may be returned under
DellWare's then-current return policy.
Warranties and Return Policy B-3