Cannot make this work between 2 PCs - makes no difference whether WIFI or Ethernet connected. Both running build 16299 I do have Private Internet Access on both machines, but have tried with it off. DELL can see LENOVO in File Explorer, but cannot access LENOVO - the dreaded error 0x80070035. LENOVO does not show DELL at all. I don't want to use a Workgroup, just have a simple means of transferring large files, otherwise pendrive. Since Windows 10 I have often had problems, with sharing working one way sometimes, but I can usually live with that All obvious things have been done, like allow sharing, switch off passwords. IP4 and 6 are allowed. There are dozens of Google searches for 0x80070035. Any suggestions please.If any members have had similar problems with a VPN please answer, I use TalkTalk as my ISP. They blocked Teamviewer a few months ago, had to get permission to run it. Could this be something similar?