When at my in-law's my PC works fine on their Wifi when I am alone. But as soon as someone else connects, especially with a mobile phone, my connection slows right down. Sometimes there are three or four of them connected at one time and they have no problem. But my PC seems to get shunted down a priority list. Any ideas (apart from divorcing and getting a new set of in-laws!)
Tech Support Guy System Info Utility version 1.0.0.4
OS Version: Microsoft Windows 10 Famille, 64 bit
Processor: Intel(R) Celeron(R) CPU N3060 @ 1.60GHz, Intel64 Family 6 Model 76 Stepping 4
Processor Count: 2
RAM: 4001 Mb
Graphics Card: Intel(R) HD Graphics, 1024 Mb
Hard Drives: C: 449 GB (369 GB Free); D: 14 GB (1 GB Free);
Motherboard: HP, 832C
Antivirus: Avast Antivirus, Enabled and Updated