安裝postgresql時，不安裝自帶的pgAdmin 4\n通過https://www.pgadmin.org/download/pgadmin-4-windows/，下載最適配的安裝包，單獨安裝適合作業系統的pgAdmin 4

【The pgAdmin 4 server could not be contacted安裝postgreSQL後啟動pgadmin錯誤解決方法 - CSDN App】http://t.csdnimg.cn/sY29T

最新的pgadmin4已經不支持win7系統了。

2016年發布的postgresql9.5.3自帶的是pgAdmin3，兼容win7。

https://www.filehorse.com/download-postgresql-32/25830/

PostgreSQL 9.5.3 (32-bit)

May, 12th 2016  -  58.6 MB  -  Open Source

Operating System

Windows XP / Vista / Windows 7 / Windows 8 / Windows 10

Author

PostgreSQL Global Development Group

Sometimes latest versions of the software can cause issues when installed on older devices or devices running an older version of the operating system.
Software makers usually fix these issues but it can take them some time. What you can do in the meantime is to download and install an older version of PostgreSQL 9.5.3 (32-bit). 

For those interested in downloading the most recent release of PostgreSQL or reading our review, simply click here. 

All old versions distributed on our website are completely virus-free and available for download at no cost.
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