Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Double Trouble

I bought two of these routers for my computer business. I sold one to a customer who complained of it not working a few days after I installed it. Because I sold the equipment, I came out to troubleshoot, free of charge. I eventually discovered that this unit will not work properly after the power is unplugged. It must be reconfigured, even though all the settings are the same! I went through 2 of these with the same customer and eventually bought a Belkin. I am EXTREMELY disatisfied with this router and will not be purchasing D-Link equipment anymore.