Windows Server 2008 R2 Clustering: The operation is taking longer than expected

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1. Disable NetDMA (https://support.microsoft.com/default.aspx?scid=kb;EN-US;951037)

  1. Click Start, click Run, type regedit, and then click OK.
  2. Locate the following registry subkey, and then click it:
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
  3. Double-click the EnableTCPA registry entry.
    Note If this registry entry does not exist, right-click Parameters, point to New, click DWORD Value, type EnableTCPA, and then press ENTER.
  4. To enable NetDMA, type 1 in the Value data box, and then click OK.
  5. To disable NetDMA, type 0 in the Value data box, and then click OK.
  6. If the EnableTCPA registry entry does not exist, enable the NetDMA functionality.

Other steps to try are1) check event log, 2) remove (dont just stop) the anti-virus (especially symantec), 3) open required ports or turn off firewall