Code 21 is a Device Manager error code that appears when you try to use a hardware device attached to your computer and the Windows prohibits you from using it.
This is due to the Windows experiences problems loading the device driver. This error message is displayed in the following format:
“Windows is removing this device. (Code 21)”
Error code 21 means that Windows is in the device removal process and the device has not been completely removed. It occurs when you set a device to be removed and then select the same device to run on your system.
Upon your instructions, Windows start to remove that device and when you on the other hand try to use/access the same device that you selected for removal, it kicks up Code 21.
If you are experiencing error code 21 on your PC, it is advisable to resolve it immediately.
Though this error will not damage your system, but will significantly lower the performance of your PC which is definitely something you don’t want especially if you work on your computer daily and use it to perform important time-sensitive errands.
To repair and resolve, try the methods given below:
This is one of the best and easiest ways to resolve code 15 on your system. Wait for a few seconds, and then press the F5 key. This will update the Device Manager view and the error will most probably go away.
Sometimes error codes may pop up due to temporary glitches. To resolve such errors, a simple reboot of your PC is enough. Shut down Windows and then restart your system.
This is most likely to resolve Code 21. However, if the error still persists then this means the underlying problem for code 21 is deeper than you think. Try method 3 to resolve.
As mentioned earlier, the error code 21 may occur if you have selected a device to remove and then you try to reuse it.
To resolve, you may have to install the device again and the driver for that the reinstalled device. To reinstall the driver without any hassle, simply download DriverFIX.
It is a smart, user-friendly, and intuitive software program designed to resolve driver problems. The program is embedded with intelligent device identification technology which:
Furthermore, it enables accurate installation and ensures that your system is running at its optimal speed.
Other features that this program boasts are full backup and restoration, safe USB management, and ejection.
If nothing works, you can try the full backup and restoration feature and restore your PC to its previous state when it was functioning properly before the error occurred.
DriverFIX creates a backup of all your files and data hedging keeps you from disasters like data loss. It restores the system to the time when it was working properly.
Click here to download DriverFIX on your system and resolve error code 21 today.
Some Windows 7 or Windows 8/8.1 users are having a hard time upgrading to Windows 10 as they are being prompted for a product key. By default, the Windows 10 operating system does not require a product key and users should not be prompted for one, given you upgraded your computer from an activated Windows 7 or Windows 8/8.1 license or from the Windows 10 Preview build. However, there are some users encountering this problem and there are several reasons for this.
There are a few reasons why some users are being prompted for a product key when upgrading to Windows 10:
Before you can fix this problem, you need to know why you’re being prompted for a product key. Some things you should know about Windows 10 product key activation are the following:
Now, if ever you’re prompted for a product key when you’re upgrading to Windows 10, you can apply the following methods:
If you’ve been prompted for a product key upon upgrading to Windows 10, you should click on the “Do this later” option. Wait for a few days then Windows 10 will get activated automatically.
One of the reasons Windows users are being prompted for a product key when upgrading to Windows 10 is that they have downloaded a wrong edition of Windows 10 and do not correspond with your current system.
NOTE: Users of Windows 7 Enterprise, Windows 8.0 Enterprise, and Windows 8.1 Enterprise are not eligible for the free upgrade offer.
If your Windows 7 or Windows 8/8.1 is not genuine or activated, you will get prompted for a product key. You need to make sure first your current system is activated.
Another thing you can try doing is to run the system file checker utility to scan if there are any broken operating system files. In doing so, you’ll be able to detect problems that might be preventing the product activation of your Windows 10 upgrade.
If in case you’ve exhausted all your resources and you are still being prompted for a product key when upgrading to Windows 10, you can try contacting the Microsoft Activation Center for further details. Check here for the appropriate telephone numbers to contact.
If you still experience the error after doing the methods above, you might want to try a powerful and trusted automated tool to fix the job.
“Windows could not start the service on Local Computer. Error 1079: The account specified for this service differs from the account specified for other services running in the same process.”If you got the error message above, then here’s how you can fix it: