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Error Code 4021 [Solved]
Zebulon Feb. 26th, 2015
How to Fix Error Code 4021 Error?
Item Info
Error Codes Error Code 4021
Recommended Download Error Code 4021 Error Fixer
File version 5.2
Size 4.5MB
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Error Code 4021 Error? What Happened?

I got error Error Code 4021 after I run Panda Cloud. Sometimes I also got blue screen error 0x000000D7 DRIVER_UNMAPPING_INVALID_VIEW. my computer is becoming slower and slower. what happened?

- Leo Marsch

Error Code 4021 Error Again? What is Wrong with My Computer?

Your PC frequently crashes with Error Error Code 4021 when running the same application

Computer runs sluggishly and always seems to be ready to crash down

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What You Can Do with Error Error Code 4021

Run CHKDSK

  • Go to the Start button.
  • In the Search box, type "cmd" (without quotes) and press Enter.
  • At the command prompt, type "chkdsk /r /f" (without quotes) and press Enter.
  • Reboot your computer.
NOTE: You might receive an error message that states:

"Access denied as you do not have significant privileges. You have to invoke this utility in elevated mode."

If you receive the above error message, it means you are not logged into you computer as an Administrator. If that's the case, follow these steps to run the command prompt in elevated mode:

  • Go to theStart button.
  • Go to "All Programs > Accessories" and right click on "Command Prompt".
  • Select "Run as Administrator".
  • In the Search box, type "cmd" (without quotes) and press Enter.
  • At the command prompt, type "chkdsk /r /f" (without quotes) and press Enter.
  • Reboot your computer.

Scan your computer for viruses. 

Some viruses can cause error Error Code 4021, especially ones that infect the master boot record (MBR) or boot sector.

Important: Make sure your virus scanning software is completely up to date and that it's configured to scan the MBR and boot sector.

How to Fix Error Code 4021 Error with SmartPCFixer?

1. Click the button to download Error Fixer . Install it on your computer.  Open it, and it will scan your computer. The junk files will be shown in the list.

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2. After the scan is finished, you can see the errors and problems which need to be fixed.

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3. When the Fixing part is finished, your computer has been speeded up and the errors have been fixed

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Tagged: Error Code 4021, How to fix error Error Code 4021

Comments (25)

What People Say: (About Error Code 4021)

Su ayuda es muy apreciada! Thankssssss!

by Terrance Cohen Feb.27th

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