Homegroup computers not communicating

  Taurus 19:56 09 Apr 2014

Hi all, I have a problem that should have a simple solution but I can't find it, perhaps someone on the forum knows the answer. I have three computers connected as a Homegroup, computer 1, a desktop; computer 2, a laptop and computer 3, a desktop. C1 and C2 both run under the same account, C3 a different account. Now, my problem is, C2 communicates with C1 and C3; C3 communicates with C1 and C2 but C1 will only communicate with C2. It recognises C3, showing all the folders- user, drives, documents, movies and music etc, but when I try to access anything I get a 'computer unavailable' boxout. I have, as far as I can tell, set all the permissions to full access but I am now at a loss.

Any help you can give me will be greatly appreciated.

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