Strange network share problem resolved

For some time I had a problem with a Windows 7 Home Premium computer when accessing to lan network shares. I was getting "0x80070035 network path was not found" or "0x80004005 unspecified error" messages while trying to access network shares on the same workgroup. I have made some research on web suggesting various solutions. It may be a firewall issue, or an issue about credential(s) manager. But lastly one other suggestion solved my issue. My problem was not those and it was about the missing feature "Client for Microsoft Networks" of my network card . Installing that feature resolved the issue.