Fix MSCAL.OCX missing/ not registered error Step by Step

Frustrated by the MSCAL.OCX error message? Well, you should want to know what this MSCAL.OCX file is, what causes this error and the most important thing is how to fix this error. In this page, you will find all answers to your questions about this MSCAL.OCX and the methods to fix it.

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What's MSCAL.OCX File?

As its file extension denotes, MSCAL.OCX is a vital ocx file and it's a component of the software Microsoft Calendar Control developed by Windows Software Developer. The latest version of MSCAL.OCX file is and MD5 value is 022ad19100530709d5a3d221fd898c77. This error can be seen on Windows XP, Windows Vista, Windows 7, Windows 8 and Windows 10.

MSCAL.OCX file information:
File Name:   
   MSCAL.OCX (Free Scan)
File Description:   
   Microsoft Calendar Control
Product Name:   
   Microsoft Calendar Control
Product Version:
   Windows Software Developer
File md5:   
File type:   
   ocx file
Security Level(0-5):   
OS Infected:   
   Download MSCAL.OCX Error Free Scan Tool

Why Do I Receive MSCAL.OCX Error?

Microsoft Calendar Control and the Windows will generate MSCAL.OCX error when MSCAL.OCX file cannot be used due to the removal or corruption of MSCAL.OCX file. Virus infection is also a potential cause of MSCAL.OCX error.

Popular MSCAL.OCX Error Messages

  • The application has failed to start because MSCAL.OCX was not found. Re-installing the application may fix this problem.
  • The program can't start because MSCAL.OCX is missing from your computer. Try reinstalling the program to fix this problem.
  • MSCAL.OCX failed. The specified module could not be found.
  • File not found: MSCAL.OCX.
  • Failed to load library 'MSCAL.OCX'.
  • Access violation in module 'MSCAL.OCX'.
  • Component 'MSCAL.OCX' or one of its dependencies not correctly registered a file is missing or invalid.

You may receive MSCAL.OCX error when you run or close Microsoft Calendar Control, start or shut down the computer, or use specific function of Microsoft Calendar Control. The time you encounter the error is very important to troubleshoot the problem.

Causes of MSCAL.OCX Error

MSCAL.OCX error can be caused by plenty of reasons. The following are the most common causes of MSCAL.OCX error.

  • The latest version of MSCAL.OCX file is overwritten by a previous version installed by another newly-installed program.
  • There is a malfunctioning or faulty hardware in your computer.
  • MSCAL.OCX file is infected with malicious adware, Trojans, spyware and malware.
  • The associated entries of MSCAL.OCX are corrupted in the registry.
  • MSCAL.OCX file that is still used by other programs is uninstalled by another program.

How to Fix MSCAL.OCX Error?

If you're confident of fixing this problem yourself, we have listed several solutions to troubleshoot your MSCAL.OCX problem.

Method 1: Do a System Restore.

System Restore is another useful utility integrated in Windows to help users revert their system files, installed applications, Windows registry and settings to that of a previous point of time. It's often used to fix problems like MSCAL.OCX error caused by unexpected change made by a new program installation or abnormal Windows behaviors.

Note: Please do a full backup before performing System Store, otherwise, you may risk losing your files and data.


a. Go to the desktop of your system, right click on Computer and click Properties.

computer properties

b. In the left pane, click System protection.

system protection

c. In the System Properties window, click System Restore.

system restore

d. In the System Restore window, click Next.

system restore next

e. From the list of restore points, select one you wish to restore from. Click Next.

select restore point

f. If you do not want to change your decision, then click Finish.

confirm system restore

g. Click Yes.

yes restore

Method 2: Run a virus scan.

Malware infection is one of the most popular cause of various computer problems like MSCAL.OCX error. Computer malware can make their way into the system, change system settings and corrupt system files. When this happens, Microsoft Calendar Control and Windows becomes more prone to MSCAL.OCX error and even malfunction.


a. Restart your system into Safe Mode with Networking.

b. Open your antivirus or antispyware program. (You can also use this recommended malware detect tool)

c. Run a full scan for your system.

d. After the scan completes, either quarantine or remove any detected malware.

e. Restart your system.

Method 3: Install Windows updates.

Computers and computer software can quickly become out-dated, so Microsoft keeps releasing updates in order to improve their security and fix technical glitches. Your MSCAL.OCX error may be fixed after you install all latest Windows updates.


a. Go to the desktop of your system, right click on Computer and click Properties.

computer properties

b. In the left pane, click Windows Update.

windows update

c. In the Windows Update window, click Check for updates.

check for updates windows 7

d. If any update is found, click Install updates to install.

install updates windows 7

Method 4: Reinstall Windows system.

Reinstalling Windows is an easy yet time-consuming way to fix software problems on your computer. It will erase everything on your computer, including your files, programs installed, and computer settings. This should be the last choice to fix your MSCAL.OCX error, as it will take a lot of time to make things ready again. And this works only when this error is caused by software problem.

Method 5: Repair corrupted Windows registry.

As the most important part of Windows operating system, Windows registry is a place that stores all information and configurations of software and hardware. A problematic registry is one of the most common causes of computer errors like MSCAL.OCX error. Software installation, uninstallation, malware infection can make changes to the registry. Over time, more and more invalid entries are left and accumulated in the registry and then lead to various errors and problems. The registry needs regular maintenance to keep it tidy and stable. Manual editing the registry is not practical for people with no computer expertise, it's recommended that you use a registry cleaner to do this job.


Note: It requires certain computer knowledge to perform the above solutions. If you're not comfortable with this process, it's recommended that you download and run this automatic error fix utility to fix your PC problems automatically:

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Does MSCAL.OCX error still persist?

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