Configure client signing in Win98/Me:
Note to enable SMB signing on Win95, then one have to install the Directory Services Client, which is found on the Win2k Srv. Install-Cd (X:\Clients\Win9x\Dsclient.exe) along with Winsock2 update and at least DUN 1.3+.
[HKEY_LOCAL_MACHINE \System \CurrentControlSet \Services \VxD \VNetsup]
EnableSecuritySignature = 0 (Disabled = 0, Enabled = 1)
RequireSecuritySignature= 0 (Disabled = 0, Enabled = 1)
If doing domain logon check How the DSClient uses DNS lookup, and check that the DNS Server is properly configured or it can cause slow logon, as it has to timeout before it uses Netbios.
Related Description of SMB signing
More Info MS KB230545
More Info MS KB249841
More Info MS KB288358 (Download original DsClient.exe)
More Info MS KB283261 (Flaw in DsClient.exe)
More Info MS KB323455 (Description of hotfix for DsClient.exe) (Replaces MS KB323466)
More Info MS KB555038 (Using DsClient.exe)