by Jack Cheen - Tech Analyst
Simple steps to remove Mismatch 121

Steps to Fix Mismatch 121

  • How did you get Mismatch 121?

    Since microsoft released windows 10 version, more and more PC users have failed to update. This may be caused be missing dll files, bad registries or outdated drivers issues. Unable to update computer drivers. Cannot install program. Pop up object error or script errors. Hard disk has not sufficient space.
  • You may receive the below error message:

    • Mismatch 121
    • This application failed to start because Mismatch 121 was not found. Re-installing the application may fix this problem.
    • Some updates will not installed
    • Runtime Error XXX, Abnormal program termination.
    • A fatal exception has occurred.
  • How to Fix Mismatch 121 Problems?

    Mismatch 121 issue is a time bomb for your PC. While you encounter Mismatch 121 issue, you had better figure out a good solution to fix it at once. Or your PC might get continuous computer problems, such as Blue Screen, system crash or program freeze. That is to say, it is important to troubleshoot Mismatch 121 problem.
Click Here to Download Mismatch 121 Fixer *Size : 4.5 MB
Estimated Download Time <60 Seconds on BroadBand

Follow the below steps on resolving Mismatch 121 in order to finally remove it.


For computer novice:

If you are a computer newbie, we suggest you to use a good error repair utility to help you troubleshoot Mismatch 121 issue.
Step 1: Click here to download SmartPCFixer.

Step 2: Launch SmartPCFixer.



Step 3: Click Fix all to repair Mismatch 121 problem completely.




Attention: Mismatch 121 problem cannot be resolved by SmartPCFixer, you may need to update PC drivers.

DriverTuner is especially designed for you to update damaged drivers in 3 steps! Scan outdated drivers by simple click the below photos, remove Mismatch 121 at once.
download drivertuner

For advanced user:

The below steps are used to repair Mismatch 121 problem manually.


Method 1: Fixing Mismatch 121 problem by sfc utility.

SFC is absolutely the most useful way to fix windows corrupted files. The whole process is quite easy.
Fow win 8/8.1/10 user:
Please visit here:
http://windows.microsoft.com/en-us/windows-10/using-system-file-checker-in-windows-10
For win vista/win 7 user:
Click "Start" Button, and type CMD in the searching box. Right-click "CMD", then run as administrator.



Type sfc /scannow and press "Enter" button



After the process is finished, you may receive one of the following messages: Windows Resource Protection did not find any integrity violations. (This means that you do not have any missing or corrupted system files.) Windows Resource Protection could not perform the requested operation. Windows Resource Protection found corrupt files and successfully repaired them. Windows Resource Protection found corrupt files but was unable to fix some of them. (In this situation, you had better do a system restore.)

Method 2: Repairing Mismatch 121 by installing drivers manually.

Right-click Computer on your desktop, then click Manage.



Find Device Manager and check if there is a yellow exclamation to notify you to update drivers. Then click update drivers as the pictures below.


Method 3: Resolving Mismatch 121 by performing a system restore.

6 Comments on "How To Repair Mismatch 121?"

  • Comment by : Pamula UK
    The software did work! I used it to download my not found Btwizard.dll easily. Great tool for repairing missing dll files.
  • Comment by : Loise FR
    je viens de mise à niveau Windows 10, mon ordinateur runs plus lent et plus lent. Mes amis me recommandent de utilisation SmartPCFixer pour se débarrasser de lui. Je ne sais pas si elle est vraiment utile. Mais après l'installation de cet outil, je reçois rarement get update erreur.
  • Comment by : Voncile
    Smartpcfixer is an amazing software for me to fix Mismatch 121.
  • Comment by : Chun
    Recently, when I am playing online games, I often receive bluescreen problem. SmartPCFixer support team helped me fix the blue screen error. Thanks a lot! I hope my review can help people who want to try smartpcfixer.
  • Comment by : Ta
    Deseved to have a try!
  • Comment by : See
    Thanks for smartpcfixer. The tool help me resolve Mismatch 121 issue.
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Download Mismatch 121 Repair Tool *Size : 4.5 MB
Estimated Download Time <60 Seconds on BroadBand