Windows 7 windows 7 wireless network access very slow

I have a Win 10 machine with no problems. My Win7 machine recently has become extremely slow in accessing the network, clocking in at about 1KB/s. I stopped all services I thought were unnecessary, ran virus and malware detection software then switched these off. Network Sharing Center says access speed is 72MB/s to 105MB/s. Everything else on the machine works at normal speed (a bit slow as it's an old computer). Network adapter is "working properly".