VirtualBox does not open

VirtualBox does not open and I'm confused.

I removed and re-installed VirtualBox but VirtualBox is still not open.

I enabled Compatibility mode and tried. It had all options but it does not work at all!!

Also when I re-installed VirtualBox I saw this warning:

Cannot rename this connection. A connection with the name you specified already exists. Specify a different name.

Solution

1.Click Start, click Run, type cmd.exe, and then press ENTER.

2.Type set devmgr_show_nonpresent_devices=1, and then press ENTER.

3.Type Start DEVMGMT.MSC, and then press ENTER.

4.Click View, and then click Show Hidden Devices.

5.Expand the Network Adapters tree.

6.Right-click the dimmed network adapter, and then click Uninstall