N300 WiFi Router - intermitent problem connecting my home PC to internet through router

Hi There Group,

Home PC, N300, Windows 10, nothing else fancy

I have a nagging problem.  Sometimes when I start up my PC and go to my generic home page I can see the Network Icon on the taskbar and it has a "red x".   I think it is red.  I am clor blind so this might not be correct.  It is an "x" .  When I try to bring up anything which requires internet access I am given and error messages that basically says no Internet connect avaiable.   If I turn off my PC and start over everyting is fine.  One more thing I also get a dialog box when I turn off the PC.  Something about a memory write problem.  I have ignored this in the past because I don't know what it means.  If it is important I will write it down the next time.

Thanks for any help or ideas.

Steve