OptiPlex 7040 SFF Core i7-6700 3.4Ghz - SSD 512 GB - 32GB

There was a problem with the machine as received. Although the wifi signal in my house is strong, the computer behaved as though the signal was weak and intermittent and I would keep losing connection with the internet. It would repeatedly automatically connect but then drop unpredictably. My laptop, which was also by my side, remained connected, showing a strong signal, with no problem. My solution was to replace the wifi adapter that you supplied with another. It now works as expected.