I just bought a Windows 10 desktop i7 2.8 Hz computer. Now after 3 weeks I changed the RAM to another RAM. Now every 30 minutes it keeps rebooting? I am going to change the old RAM back into the original config, see if that prevents from reboot? Otherwise what else can be the issue? Or do I need Win 10 Professional install to fix it? Does disconnecting from Wi-fi prevent viruses breaching security ? Thanks.