Win7 can not run the JER installation package solution

            1. First, confirm the version of your system, whether it is 64-bit or 32-bit Win7 system, the version of the system is different, and the version of jer that needs to be installed is different.
2. If you still can't solve the problem, it may involve the permissions of the Win7 computer. At the same time, press the win+R shortcut on the Win7 computer keyboard to open the running window of the computer. In the open running window, Enter service.msc and click Enter to open the Win7 computer's service window.
3. In the open service window, find the Windows Installer item, double-click it to open it.