The OplocksDisabled registry value configures Windows clients to either request or not
request oplocks on a remote file. To disable oplocks, the value of
OplocksDisabled must be set to 1.
HKEY_LOCAL_MACHINE\System\
CurrentControlSet\Services\LanmanServer\Parameters
EnableOplocks REG_DWORD 0 or 1
Default: 1 (Enabled by Default)
EnableOpLockForceClose REG_DWORD 0 or 1
Default: 0 (Disabled by Default)
