[gipsies]

A microwave operates around the 2.4 GHz frequency, so it likely shields only against those frequencies. This is where WiFi lives (in particular the higher channel numbers around 11 and 13). So test the impact on WiFi reception?

[hackuser]

Older Wifi uses 2.4 GHz; since 802.11n came out years ago it also uses 5 GHz. Generally 5 GHz frequencies are recommended, when you have a choice, because usually there is less interference.

While we're at it: In the 2.4 GHz range there only are 3 non-overlapping channels: 1, 6, 11. I think 14 also is an option in some countries, not including the U.S.