Summary: The "Safely Remove Hardware" icon can occasionally disappear. It turns out there's a simple workaround to safely remove hardware anyway.
I have several USB devices, and I'm used to using the "safely remove hardware" icon in the taskbar before I unplug any of them. All of a sudden that icon has disappeared, and I see no way to "safely remove hardware". What do I do? Can I just unplug the device I want to remove anyway? Or do I need to reboot every time this happens?
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This happens to me all the time. The remove hardware icon in the taskbar's notification area disappears occasionally for reasons unknown. I've never actually had a problem just unplugging the device anyway, but it still makes me feel uncomfortable to do so.
So, I stumbled onto a fairly reasonable workaround.
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Normally, when you have a removable USB device installed, Windows displays a small icon in the notification area (the right most collection of icons) of your task bar:
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If you hover your mouse over it you'll see it's tool-tip: "Safely Remove Hardware".
The purpose of "Safely Remove Hardware" is simple: it's how you tell Windows that you're about to remove a device so that Windows can finish whatever it needs to do with it. In the case of disks, for example, Windows flushes all disk buffers, avoiding things like potential corruption.
And that's the fear - if you remove something like a USB thumb drive without first telling Windows, it's possible to corrupt the contents of the drive. In practice that doesn't happen often, but it's possible.
The problem is that occasionally, for reasons unknown, the "Safely Remove Hardware" icon can disappear. Even though there are devices installed that require it - it's nowhere to be found.
When this happens, what I've found is that you can click on Start, Run..., and type in:
RunDll32.exe shell32.dll,Control_RunDLL hotplug.dll
And press OK.
That will bring up the "Safely Remove Hardware" dialog:

From this dialog you can click on the device you want to remove, and press Stop. Once Windows is done with it, you can then remove the device.
Of course a side effect I noticed when I did this was that the "Safely Remove Hardware" icon reappeared.
If it happens often enough, you can create a desktop shortcut for that geeky looking command.
Right click on your desktop, click on New, and then click on Shortcut. In the resulting dialog box enter that "RunDLL32" command listed above.
That will bring up the "Safely Remove Hardware" dialog:

Click on Next and change the name to "Safely Remove Hardware":

Now, whenever you need to remove hardware, and the icon isn't present on the taskbar notification area, you can simply double click on this new shortcut and get the job done.
Article C2783 - September 9, 2006
Thanks for the suggestion, Leo. However, I have the same problem omahabullock had. The hardware item (Polar heart rate monitor infrared interface) doesn't register. However, the time before last time I pulled it out, my Fujitsu computer crashed on me, and I had to reinstall Windows. At that time I hadn't registered what had happened, or what caused the crash. So I unplugged the hardware yet another time, but this time, when the Fujitsu "you have to reinstall Windows" dialogue came up, I pressed cancel, and the computer just restarted, not even in safe mode, and everything was hunky dory. Still, better safe than sorry. These days I turn off the PC when using the Polar interface.
Posted by: David at May 21, 2010 3:51 AMThis works, thank you for help!!
Posted by: J.B. at June 14, 2010 11:20 AMOnce I safely remove hardware, my computer wont show drives anymore, even after unplugging-replugging. I have to reboot! Why does this happen?
Posted by: Chris at July 9, 2010 1:03 PMThanks a lot, this works perfectly!
Posted by: Ananthakrishnan at July 16, 2010 11:35 PMI have the opposite problem once I removed a thumb drive and I get two removal warnings
1.Cardman 4040
2._NECDVD+-RW-6650A-(D:)
These man have never been in or on the drives I hav eno idea what they are and I can't understand after I remove the phantoms they keep reappearing- is someone getting into my computer through them?
Posted by: Joan at August 15, 2010 3:40 PM