Windows Server Essentials 2016 Thinks USB WiFi adapter might be boot device

[samsquared2]

I added a USB WiFi adapter to my server recently (ethernet connection not practical). It's working fine but if I shut down the server, when I power on I get this error message:

"Remove disks or other media. Press any key to restart"

It starts fine after I press a key. Interestingly, this does not happen if I do a restart instead of a shutdown. Is there some setting I need to change?

 

[WindowsForum AI]

This is almost certainly a firmware (BIOS/UEFI) boot-order issue, not a Windows Server Essentials problem.
On a cold power-on, the firmware is detecting the USB Wi‑Fi adapter and trying to boot from USB before it reaches the server’s system drive. The adapter itself is not necessarily faulty; some USB devices identify themselves in a way that firmware treats as removable boot media. Pressing a key tells the firmware to continue to the next boot device.

What to change​

1. Reboot the server and enter its BIOS/UEFI Setup screen.
   • Common keys are F2, Delete, F10, F12, or Esc; the correct key normally appears briefly during power-on.
2. Find Boot Order, Boot Priority, or Boot Sequence.
3. Move the internal drive / Windows Boot Manager to the first position.
4. If available, set USB Boot, Boot from USB, or External Device Boot to Disabled.
   • Keep this enabled only if you regularly boot recovery or installation media from USB.
5. Save changes and fully shut down the server. Then power it back on to test.

Why restart behaves differently​

A restart does not always initialize USB hardware in exactly the same way as a full power-off/cold boot, so the adapter may not be offered as a boot candidate then. Windows shutdown/restart behavior can also differ depending on the configured power state, but the message itself is being shown before Windows begins loading, by the firmware. Microsoft documents that shutdown and restart can use different startup paths. citeturn0search0

If the problem continues​

1. Try a different USB port, preferably a rear motherboard port rather than a front-panel or hub-connected port.
2. Check for a BIOS/UEFI update from the server manufacturer.
3. Tell us the server make/model and whether its boot menu lists the Wi‑Fi adapter or a generic “USB device”; then we can point you to the exact firmware setting.

 

[ET Ducky]

Because it only happens after a full shutdown, it's likely the Wi-Fi adapter is showing up to the firmware as a virtual CD drive that holds its Windows driver, which many USB Wi-Fi adapters do when they first get power. Open the firmware's one-time boot menu after a full shutdown and look for a USB CD-ROM entry or the adapter's brand name. Some firmware lists that entry under optical drives, so it can stay ahead of the system disk even with USB boot turned off. If it shows up there, disable CD/DVD boot or move the optical drive group below the hard drive in the boot order.

Drafted with AI.

 

[WindowsForum AI]

ET Ducky, that’s a useful possibility. My earlier reply was too certain that the adapter was being selected as a generic USB boot device. Some USB Wi‑Fi adapters do initially present a virtual CD-ROM containing drivers, but we don’t yet know whether samsquared2’s adapter does.
@samsquared2, I’d check before changing another boot setting:

1. After a full shutdown, open the firmware’s one-time boot menu and note whether it lists the adapter, a USB drive, or a USB CD/DVD drive.
2. In Windows, check Device Manager → DVD/CD-ROM drives for a virtual drive associated with the adapter.
3. If practical during planned downtime, shut down, unplug the adapter, and power on once. Wi‑Fi will be unavailable for that test.

If the adapter appears as an optical boot option, move that option below Windows Boot Manager/the system drive in firmware setup. Disabling optical boot is an alternative, but it would also prevent booting optical recovery media until you turn it back on. If none of those checks implicates the adapter, we should revisit the boot order rather than assume the virtual-CD explanation is the cause.