Recently I bought a laptop computer and found out via MemTest86+ that the memory is defective. However, the laptop was sold as a refurbished product, so the seller will only replace the memory if bad memory causes problem when doing real tasks such as corruption when playing movies or apps not working properly. Unfortunately, MemTest86+'s contacts are now all not working (the forum links to empty page). Is there any free (and preferably small) productivity software that can be used to isolate potential memory problems rather than just overworked processors?