Windows 7 permission settings are useful to programmers. Today, I encountered a problem: I used plsql developer to connect to a remote oracle database. All the methods on the Internet were exhausted. oracle uninstalled the database N times and installed it N times, still unsolved. At last, we found that the logon user has insufficient permissions. I 've been delayed for a whole day. When we use plsql developer for development, we often connect to a remote database. Generally, we download and install an oracle client, A green version of plsql developer can solve the problem. The problem is that the database name can be automatically matched, but cannot be connected, and no error message is available. I changed the user permission: computer-management-System Tools-local users and groups on the right (double-click)-user (double-click)-Administrator (double-click) -The account has disabled the hooks in the previous check box. Then restart the system (but this time the Administrator user logs on) to solve some permission problems, such as filenotfound access denied and other operations involving permissions.