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windows 7 cannot connect to a network share

i have a problem: win 7 pro that is a member of a workgroup that has shares on windows 2000 server (stand alone, not DC).
the win 7 has network drives mapped to the server. suddenly whithout any reason that i see, it can't connect to the shares. it asks for password, and any combination i give (eg server\user password or even server\administrator) is rejected.
other computers (xp and 7) on the network are having no problems with their shares.
i created another user on the computer and had same issue.
system restore was also tried.
it seems that it happened after a server restart (for maintanance), but as i said - no other computer has problem.
can't figure where it comes from...
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gilsolutions
Asked:
gilsolutions
2 Solutions
 
glenn_1984Commented:
1.  Can you connect logged on as Administrator on the local pc?

2.  From a CMD prompt (Start, Run, CMD) -- type ipconfig /all <enter>
Make sure you have a valid ip address and gateway for this network.

If not, try ipconfig /release then ipconfig /renew
OR
Set the ip address in Network properties

3.  Can you ping the server?  ping ###.###.###.### where the number is the ip address of the server.  If not, see #1 above.

4.  Remove and re create one of the shares from the cmd prompt:
net use f: /d   (delete the share)
net use f: \\server name or ip address\share name  (i.e. \\myserver\photos)

Can you now connect to drive f: (or whatever)?

Try the same in Windows Explorer if necessary.

Did the problem go away with any of the above?
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5g6tdcv4Commented:
when the win7 client tries to connect are you seeing security errors in the event log on the 2000 server?
try changing the lmcompatability level key in
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
to dword:00000001
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Iain MacMillanIT ManagerCommented:
you could also remove Remote Differential Compression from the Program & Features Turn options on/off, and look at turning off Autotune & Heuristics when on a mixed mode network.

netsh interface tcp set global autotuninglevel=disable
netsh int tcp set heuristics disabled
netsh int tcp set global congestionprovider=ctcp   -- this improves throughput and is OFF by default

however you can also try this - Go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System and add a DWORD 32-bit key for EnableLinkedConnections and set its value to 1.

There have been several cases where Windows 7 logons had problems with network drive scripts. The mapping issue was related to the way the accounts are created. Windows creates two logons, one as a non-admin token and the other contains your full token. This can happen to Vista as well.

This is apparently by design, but when your maps don’t run it’s not exactly what you want to hear.
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Hamid Reza MolahadiCommented:
Run -> cmd -> net use * /del /y

then try again
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gilsolutionsAuthor Commented:
Well, it is quite amazing...
I saw on the server some error messages in the system event log, that were logged just after the restart: "error 3034: the redirector was unable to initialize security content or query context attributes". That directed me to the thought thata there might be here some time issue. Then I remembered that just before the restart I noticed that the server's clock is one hour back and corrected it. I now put the server's clock back one hour - and my win 7 computer connects like usual. I'm glad it is working but can hardly understand it...
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Iain MacMillanIT ManagerCommented:
default domain rules normally stipulate that there cannot be any more than 60 min difference in time or the system will not be allowed to authenticate.  all domain system should be set by policy to get their time from the DC's.  I link my DC's in turn to an atomic clock.

glad you got it resolved.
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gilsolutionsAuthor Commented:
well, the advice only led me in some way to the solution, that was incomplete, because i remained with a server with wrong time...
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