If you reinstalled PCMC, restart your meter and your computer:
Unplug the power cord.
Wait one minute.
Plug your power cord back in, ensuring that it is plugged directly into a wall outlet.
Restart your computer by closing all open programs and selecting Shut down from the Windows Start menu.
Once your computer is completely shut down, turn it back on.
Attempt your connection again.
Solution 3: Check the connection between your meter and your computer:
Unplug the USB cable from the back of your meter, then firmly reconnect it.
Unplug the USB cable from your computer, then firmly reconnect it.
If you use a USB hub, remove the cable from the USB hub and plug it into a USB port on your computer.
Retry your connection.
If the connection still fails, try moving the USB cable to a different USB port on your computer
Recommended: Use a USB port on the back of your computer.
Solution 4: Try changing your PC Meter Connect Internet options:
Right-click the PC Meter Connect icon in the system tray (small icons by the clock).
Select Internet Settings.
Toggle the settings for HTTP Transfer Protocol Method and Protocol. After you make a change, select OK and retest. Try all available combinations. Some options may be disabled, depending on the type of meter you use.
HTTP Transfer Protocol Method: Determines whether the data transferred is chunked or non-chunked. Try changing this first, many firewalls will not allow chunked data by default.
Protocol: Determines which transfer protocol is used for the data transfer,. Many firewalls will not allow FTP.
Proxy Address Assignment: If you use a proxy, select Use Internet Explorer settings to use the proxy. Your IT department must provide the proxy settings if they need to be set manually.