Just today my main desktop computer running Windows 7 x64 can't connect with my Unraid server.  The main TOWER GUI and Unmenu are accessible, and when I look in my Network explorer the server shows up along with my other computers , but when I double click on it I get the "Windows cannot access tower - Error code #0x80070035 Network path was not found".  I don't understand none of the settings for the firewall or network have been changed on this system, yet I have two other computers in my house a laptop and desktop and they both can connect and view the directories on the unraid server.

 

Where should I start looking for the problem?

If its working fine on other machines then it must be related to your main desktop computer; have a look through these results, common issues are firewall related but also updates installed from Windows... could try a system restore to last week if you want.

 

http://www.google.co.uk/search?hl=en&q=Error+code+%230x80070035+Network+path+was+not+found&meta=

 

Try disabling the pnp os setting in the bios on your Win7 machine.