Programm stürzt ab und sperrt Comport (USB-RS232)

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The trick is to open the Command Prompt as administrator and start the Device Manager from the same command prompt.

1. Right-click “Command Prompt” in Accessories and choose “Run as Administrator”

2. Enter set devmgr_show_nonpresent_devices=1

3. Enter start devmgmt.msc

4. In the box that opens, select Show hidden devices in the ‘view’ menu.

Now if you expand the section on COM ports, all the COM ports that have ever been created will be displayed, the non present ones being in grey. You can uninstall away anything that you don’t want
(right click, select uninstall).