On my Lenovo X201 Tablet (which has been working fine for 2 years) firstly the wireless stopped connecting. With the ethernet OK I went to Device Manager (no !s) and clicked the 'update (both) drivers' but there were up to date.
Then the ethernet stopped connecting too. I've been round and round the various diagnostic problem apps (including Lenovo's) and both are 'working OK'. The tabs on the adaptor properties show no problems. My router is working fine, 4 other devices use it daily.
Two local computer repair technicians can find no causes. Any ideas will be gratefully tried out - thanks.