I bought this to upgrade my computing at the end of Windows 7 support by Microsoft. No regrets whatsoever! I was looking for the fastest possible system at the lowest possible price. In every way, this computer delivered. With the large amount of memory and the 1 TB solid state hard drive, this one screams. I was planning to ditch Windows 10 and go to Linux, but it has worked so fast and smoothly in my case that I am happy with it now. However, this is ONLY after using "Spybot Antibeacon" to cut down on Microsoft's DOZENS of unacceptable built-in spy features, and using the app "Windows10 Debloater" to eliminate a very large amount of unnecessary Windows10 features. (Note: some technical knowledge is required to use this app). No, it does not have built-in wifi. Not a big deal. I just plugged in a USB wifi adapter and it works fine. I couldn't be happier with this PC, and I thank the refurbisher for a great job.