There is such a phenomenon that when you install the Windows XP computer receives a connection request on the 445 port, Windows XP assigns a memory and a small amount to provision CPU resources to provide services for these connections. When the connection request is too heavy, it may The CPU usage is too high, resulting in a sharp decline in system performance, and even enters the fake state. Problem Cause: This is due to the number of "proportional disorders" in the number of Windows XP work items, and if there is a suitable MaxWorkItems setting, the system response capability can be improved. Workaround: Click "Start" → "Run", enter "regedit" in the Run dialog, click "OK", open the registry editor, and use the following subkey: hkey_local_machine / system / currentcontrolset / services / lantmanserver, in In its right window, create a DWORD value called "MaxWorkItems", then double-click it, in the "Edit Dword Value" dialog box pop-up, determine the key value of the key according to the computer's memory capacity, if the computer is less than 512MB Please type "256"; if the memory is greater than 512MB, set it to "1024". After completing the operation, exit the Registry Editor and restart your computer.
There are a lot of ways to close the 445 port, but I recommend the following methods:
Modify the registry, add a key value
Hive: HKEY_LOCAL_MACHINE
Key: System / ControlSet / Services / NetBt / Parameters
Name: SMBDeviceEnabled
TYPE: REG_DWORD
Value: 0
After the modification, restart the machine to run "netstat -an", you will find that your 445 port is no longer listenging.
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