Cannot access files between local network PC

I have 2 computers ethernet under XP Home SP3.  They are of type ethernet connected behind a router wireless Airllink 101 a Vista laptop is connected on the wireless (the Vista laptop cannot access files either).  At the same time as I had a third ethernet PC connected without SP and I was able to access his files for at least one of the other PCs.  I tired remove firewalls (temp) and Virus check without success.  In the network section, I can see the computers and shared files on the PC but when I try to open directories is said I can't have permission to use this network resource.  Memory: server to process this command.  Server?  Here is the esentiallly peer computers back-to-back.  I have 50 + GB on each PC.  I believe that this has happened after that I installed SP2 or SP3.


See the article in the Knowledge Base Microsoft Antivirus software may Cause Event ID 2011 for a likely solution.

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