Data Memory Systems provides a 30-day money back guarantee and a Lifetime Replacement Guarantee on all Memory Modules. DMS warrants all our Memory against manufacturing defects for the lifetime of the original owner. Memory modules will be repaired or replaced with no freight cost to the consumer unless otherwise directed. The warranty is void and does not apply if the Memory Module has been modified, abused or subjected to static or electrical surges or incorrectly installed. DMS will not reimburse consumers for installation charges if a memory module is found defective or incompatible or for damage to equipment, program loss or costs associated with data recovery. Data Memory Systems only guarantees compatibility for the original application in which it was purchased for. This does not include upgrades done to your machine such as, Motherboard, Processor, BIOS or Firmware Upgrades. Memory installation should be performed by an authorized technician.