- Tap the Win + R keys to open the Run dialog box and then type “cleanmgr” in the field and hit Enter to open the Disk Cleanup window.
- After that, select the drive you want to clean.
- Now click OK to clean the disk and restart your computer.
One of the preferred ways to upgrade Windows 10 is by creating a bootable USB drive. However, you might change your mind when you encounter an error during the Windows 10 Setup that says, “We can’t find a USB flash drive”. Worry not for this error can be fixed using some suggestions that will be provided in this post.
The funning thing about this error in Windows setup is that the computer says it’s not there when it’s clearly there. To fix this problem, you need to check if the USB device is accessible on your computer or you can also try a different USB device. In addition, you could check if there are any issues with both the USB 3.0 and USB 2.0 ports as it could be the reason why you’re getting the error or fix the bad sectors in the USB drive as well as see if the USB drive is set as the primary drive.
The first thing you can do to resolve the problem is to check if you can access your USB device from your computer. All you have to do is open File Explorer and check if the USB device is listed there or not.
The next thing you can do to fix the error is to try connecting a different USB device, specifically the one that has more significant storage space. You also have to make sure that it’s working on a different PC.
Although the USB 3.0 ports are compatible with the USB 2.0 ports, it does not necessarily mean that there wouldn’t be any problem when you use them which is why it’s best to fix any issues in them or better yet, use a compatible drive.
When it comes to some issues concerning the hard drive or removable devices, there is a utility in Windows that might help which is called “chkdsk”. To use it, follow the steps below.
CHKDSK [volume [[path] filename]] [/F] [/V] [/R] [/X] [/C] [: size]]
Note: In the command given above, “[/F]” will try to fix the system errors while “[/R]” will be the one to fix the bad sectors.
You might also want to check if the USB drive is set as the primary drive because if it is, then it won’t appear on the list. It could also be that the USB drive has a primary disk in it. To undo it, you need to use the DISKPART utility.
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.
"ERROR_FULLSCREEN_MODE" and/or as the hexadecimal value 0x3EF.”
“Operating System Loader has no signature. Incompatible with SecureBoot. All bootable devices failed Secure Boot verification.”There are two main causes for this error – it could be that your computer is using a bad unauthentic Boot Image File or the Windows operating system is installed in the BIOS Mode. To fix this error, you can try performing a “cold” boot or reset the BIOS or reset your Windows 10 computer.