I bought Archer A7 and did some basic configuration. Within 24 hours, the unit powercycled mutiple times. Is this a faulty unit?

I downloaded the following file: https://static.tp-link.com/2018/201804/20180403/TL-WR841N(US)_V14_180319.zip Attempted an upgrade using the ".bin" file. Keep getting the error 18005. Error code:...