0x80004005 unspecified error / 0x80070043 the network name cannot be found


On one of my servers (virtualized on vsphere 5.0 + windows 2008 R2 + Exchange 2010) , when trying to access a remote share (\\srver\share), I am getting the following messages :

0x80004005 unspecified error
0x80070043 the network name cannot be found

Other servers (same OS) are not affected by this message

What we changed recently : As far as I know, an external consultant activated a network policy on another server to secure the wireless connections
What I already tried to do :
activate network discovery on the connection.

Thanks for your help
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hdoumAuthor Commented:
I read this article : on MS technet and I discovered that there is something weird in the registry under "HKLM>System>CurrentControlSet>Control>NetworkProv ider>Order" :
the value is "PDVFSNP,RDPNP,LanmanWorkstationtdriv怛鄁"
Do you this could cause the problem ? How should I modify the key ?
hdoumAuthor Commented:
OK I when I enter \\SERVER\SHARE I get the error message
If I enter \\SERVER\SHARE\ with a backslash at the end, the share opens !

I created a backup of the registry and replace the old value for "NetworkProvider>Order" and for NetworkProvider>HWOrder" (they both had the same value)

Now the value is "PDVFSNP,RDPNP,LanmanWorkstation"

Now it's ok. But I am still wondering how this registry key could have been modified with chinese characters ??? Malware ? I am scanning the server with TrendMicro WFBS and we'll see the result.

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hdoumAuthor Commented:
Still looking for the root cause : how could the registry key be modified ?
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Windows Server 2008

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