The following actions rectified the problem and might be worth a try for other people. One thing it demonstrates is that the Intel legacy wifi driver (Intel(R) PRO/Wireless 3945ABG Network Connection) works in Win 10 although no longer supported by Intel or Microsoft. In my case it involved disabling PCMCIA drivers (I do not use the PCMCIA card reader but there could be other options not tested). It was tested and worked in a Fujitsu Tablet ST5112 with a Centrino processor, running Win 10 Pro, 32bit as follows: