Error messages this guide covers
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- “This application has failed to start because MMVCP70.dll was not found. Reinstalling the application may fix this problem.”
- “MMVCP70.dll could not be found.”
- “mmtask.exe — Unable to Locate Component.”
- “The program can’t start because mmvcp70.dll is missing from your computer.”
- “Error loading mmvcp70.dll. The specified module could not be found.”
A compatibility-related loader message, including “not designed to run on Windows,” is also possible, although it is not a confirmed common message for this particular file.
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The 60-second answer
mmvcp70.dll is strongly associated with the discontinued MusicMatch Jukebox application and its related startup task, mmtask.exe. It is not established as a Windows system file, and the “Sample Corporation” and “Sample Application DLL” details shown in some file databases should not be treated as the real product identity.
If MusicMatch is still installed, repair or reinstall the exact application from an original installer or trusted recovery source. If you no longer use MusicMatch, remove the old program and disable its remaining startup entry. Do not download mmvcp70.dll from a random DLL website or copy it into System32.
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What mmvcp70.dll belongs to
Historical MusicMatch file inventories place MMVCP70.dll in the MusicMatch Jukebox installation directory beside files including MMVCR70.dll and mmtask.exe. A typical historical location was similar to:
C:Program FilesMUSICMATCHMUSICMATCH Jukebox
On a 64-bit Windows installation, an older 32-bit application may instead be under:
C:Program Files (x86)MUSICMATCHMUSICMATCH Jukebox
MusicMatch Jukebox was a Windows music player and media-management program. Its assets were later acquired by Yahoo, which moved users toward Yahoo Music Jukebox. The original software is now obsolete, so there is no current official Microsoft download specifically for mmvcp70.dll.
Some file-index pages describe the file as a 32-bit version 7.0.0.0 component of approximately 0.47 MB. Those details come from historical third-party listings and are not enough to verify a replacement file’s hash, signer, build, or exact package version.
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Is it a Microsoft runtime?
No reliable evidence shows that mmvcp70.dll is a normal, standalone Microsoft runtime download. The filename resembles Microsoft runtime names such as:
msvcp70.dllmsvcp71.dllmsvcp140.dll
That resemblance does not make the files interchangeable. MMVCP70.dll appears to have been bundled locally with MusicMatch or another application. The generic metadata that labels it “User-Generated Microsoft (R) C/C++ Runtime Library” is not sufficient to identify its actual publisher.
Microsoft explains that an application must receive the runtime architecture and version it was built to use. Current Visual C++ Redistributables are not universal replacements for old private application DLLs. See Microsoft’s DLL redistribution guidance and supported Visual C++ Redistributables.
Why the error appears during startup
The startup error usually means an old MusicMatch component is still being launched even though one of its files is missing.
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- MusicMatch itself
- A leftover startup command
- A scheduled task
- A startup-folder shortcut
- An incomplete uninstall
- Antivirus software that removed or quarantined one file
The exact executable named in the dialog matters. If the message identifies mmtask.exe, MusicMatch is the leading suspect. If it names another program, do not assume that copying a MusicMatch DLL will repair it.
Causes and the correct response
| Likely cause | Best response |
|---|---|
| MusicMatch files were deleted or partially uninstalled | Repair or reinstall MusicMatch |
MusicMatch is gone but mmtask.exe still starts |
Disable or remove the identifiable startup entry |
| Antivirus quarantined the original file | Review protection history and restore only a verified file |
| The application or a dependency is damaged | Reinstall the complete application |
| Windows itself has broader corruption | Run DISM, then SFC |
| The file is in an unexpected location | Scan it and investigate its parent process |
Fix 1: Repair or reinstall MusicMatch
Use this fix when you still need MusicMatch, or when the error appears while opening the old application.
Step 1: Check whether MusicMatch is installed
On Windows 11:
- Select Start.
- Open Settings.
- Select Apps.
- Select Installed apps.
- Search for MusicMatch, MusicMatch Jukebox, or Yahoo Music Jukebox.
On Windows 10:
- Select Start.
- Open Settings.
- Select Apps.
- Select Apps & features.
- Search for the same names.
You can also open Control Panel and select Programs → Programs and Features.
If the program is listed and offers Repair, use that option first. If there is no repair option, uninstall it and reinstall it from the original installer, a trusted original backup, or an appropriate OEM recovery source.
Do not substitute a current Visual C++ package for the application installer. The installer is the component that should place the application-local DLLs and their related files together.
Step 2: Reinstall from a known-good source
Before reinstalling:
- Close the error dialog.
- Back up any MusicMatch library or playlist data you still need.
- Remove the damaged MusicMatch installation through Installed apps or Programs and Features.
- Restart Windows.
- Run the original installer.
- If Windows blocks the installer, right-click it, select Properties, and check whether an Unblock option is available on the General tab.
- Right-click the installer and select Run as administrator if necessary.
Keep the application in its normal installation directory. Do not extract MMVCP70.dll separately into a Windows system folder.
How to tell whether this worked
Restart Windows and open MusicMatch if it remains installed. The missing-file dialog should no longer appear, and the application should launch without mmtask.exe reporting a missing component.
If the same message remains, note whether it names mmtask.exe or another executable. A reinstall may have restored the file while a separate stale startup command continues to point to an old path.
Fix 2: Remove a stale MusicMatch startup entry
Use this fix when MusicMatch has already been removed and the error appears only during login.
Check Startup apps
- Press Ctrl + Shift + Esc to open Task Manager.
- Select Startup apps on Windows 11, or the Startup tab on Windows 10.
- Look for an identifiable entry containing MusicMatch, Yahoo Music, or
mmtask. - Select it.
- Choose Disable.
Restart Windows. If the error disappears, the startup entry was the caller.
Disabling an entry is preferable to immediately deleting registry data because it is reversible. If the computer works normally afterward, you can later remove the obsolete application and its clearly identified startup command.
Check scheduled tasks
- Press Start and type
Task Scheduler. - Open Task Scheduler.
- Select Task Scheduler Library.
- Review tasks for an identifiable MusicMatch or Yahoo Music name.
- Select the task and inspect Actions.
- Disable only a task that clearly launches MusicMatch or
mmtask.exe.
Restart Windows and confirm that the dialog is gone.
Check the startup folders
Press Windows key + R, enter:
shell:startup
Press Enter and remove or move only a shortcut that clearly belongs to MusicMatch.
Repeat with:
shell:common startup
This checks the startup folder shared by all users. Again, do not delete an unknown shortcut merely because it launches an executable.
Check the exact command if needed
If the entry is not visible in Task Manager, inspect the error dialog and the startup locations carefully. You can also use Task Manager → Details while the error is present to look for mmtask.exe.
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How to tell whether this worked
Restart the computer several times, including a normal sign-in after a full shutdown. If no MusicMatch dialog appears and you do not need the software, the stale startup component has been handled. You do not need to restore the DLL simply to silence an obsolete program.
Fix 3: Check Microsoft Defender quarantine
Security software can remove an old DLL if it is damaged, modified, or detected as suspicious.
In Microsoft Defender:
- Open Start.
- Type Windows Security and open it.
- Select Virus & threat protection.
- Select Protection history.
- Review recent actions for a MusicMatch directory or
mmvcp70.dll. - Expand an entry to inspect its path and detection details.
Restore the file only when all of these are true:
- It came from a trusted, intact MusicMatch installation.
- The path is the expected MusicMatch application directory.
- You can verify the original installer or backup.
- You understand why Defender flagged it.
Microsoft notes that restoring a quarantined file can cause it to be detected again. Use Allow on device only when you are confident the file is safe. See Microsoft’s Protection History documentation.
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If the file came from an unofficial DLL site, do not restore it. Remove the downloaded file and run a full Microsoft Defender scan instead:
- Open Windows Security.
- Select Virus & threat protection.
- Select Scan options.
- Choose Full scan.
- Select Scan now.
Fix 4: Reinstall the complete application, not just one DLL
A “specified module could not be found” message can mean that a dependency of MMVCP70.dll is missing. Replacing the named file alone may simply move the failure to the next missing dependency.
If MusicMatch or another legacy application is still required:
- Uninstall the application.
- Restart Windows.
- Remove only leftover folders that you have backed up and positively identified.
- Install the original application again.
- Start it once with Run as administrator if its installer or first-run setup requires elevated access.
- Reboot and test it normally.
For another application that happens to report the same filename, identify that application first. The same DLL name could theoretically have been bundled by more than one program, but the available historical evidence most strongly points to MusicMatch.
Fix 5: Do not copy the DLL into System32 or SysWOW64
MusicMatch was a 32-bit application. A 32-bit application normally uses its own application directory, and Windows searches the executable’s directory before system directories for ordinary desktop applications. Microsoft documents this behavior in its DLL search order.
That means these are poor repair targets:
C:WindowsSystem32
C:WindowsSysWOW64
Despite its name, SysWOW64 is where 32-bit system components are maintained on 64-bit Windows. Neither folder is a safe dumping ground for an arbitrary application DLL.
Manual copying is appropriate only when you have the exact file from a known-good original MusicMatch installer or a verified installation of the same version. Even then, place it in the application directory expected by the calling executable, not in a Windows system folder.
Fix 6: Do not use regsvr32 for this file
regsvr32 is intended primarily for registering COM and ActiveX DLLs that expose a DllRegisterServer entry point. Runtime and ordinary code libraries generally do not need registration.
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MMVCP70.dll is reported as an application runtime-style DLL, not a COM component. Registering it is therefore not a supported general repair and may produce another error, such as a missing entry point. Reinstall the parent application instead.
Fix 7: Run DISM and SFC only for broader Windows problems
MMVCP70.dll is not established as a protected Windows system file, so system-file repair is not the primary solution. Use these commands when you also see Windows instability, damaged built-in components, failed updates, or other system-file errors.
- Open Start.
- Type
Command Prompt. - Right-click Command Prompt.
- Select Run as administrator.
- Run:
DISM /Online /Cleanup-Image /RestoreHealth
- Wait for it to complete.
- Then run:
sfc /scannow
Microsoft recommends running DISM before SFC. The commands may take time and can appear stalled at a percentage for a while.
Success means DISM completes without an unrepaired image error and SFC reports that it found no integrity violations or repaired corrupted files. Restart Windows and test again.
If SFC reports that it could not repair some files, review the result, restart, and run the commands once more. If the only remaining symptom is the MusicMatch startup dialog, return to the startup-entry and application-repair steps rather than repeatedly running SFC.
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Fix 8: Driver and Windows Features checks
A graphics, audio, or Windows feature update is not a normal fix for a missing MusicMatch DLL. Still, check these areas if the error began after a wider system change or if the application has additional hardware-related failures.
Check optional Windows features
- Press Windows key + R.
- Enter:
optionalfeatures
- Press Enter.
- Review the Windows Features list.
- Do not enable random legacy features just because the DLL is missing.
Only change a feature when the application’s documentation specifically requires it. Restart if Windows requests it.
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Check Device Manager
- Right-click Start.
- Select Device Manager.
- Expand Sound, video and game controllers and any other category relevant to the application.
- Look for a warning icon.
- Right-click a clearly affected device and select Update driver.
- Choose Search automatically for drivers.
A driver update can address a separate audio or graphics problem, but it will not normally recreate MMVCP70.dll.
If you are checking several devices manually and cannot tell which driver is stale, Outbyte Driver Updater can scan and identify driver issues; the free scan shows the findings, while driver installation is handled by the full version. Do not treat a driver update as a substitute for repairing the application that owns this DLL.
What to do if reinstalling does not help
Work through these checks in order:
- Read the executable name. Confirm whether the dialog names
mmtask.exe, MusicMatch, or another program. - Find the expected path. Inspect the application shortcut or startup command and determine which folder the executable uses.
- Check whether the file exists there. A file in the wrong directory may not be found by the application.
- Look for dependent DLL failures. The named file may be present while one of its dependencies is missing or incompatible.
- Check antivirus history. A restored file may be removed again if the security product still considers it unsafe.
- Use compatibility settings cautiously. Right-click the application executable, select Properties → Compatibility, and test an older Windows compatibility mode only if the application itself fails after its files are restored.
- Remove the stale startup command. If the error occurs only at login, disabling
mmtask.exemay be the correct fix even when the application was reinstalled. - Use System Restore only as a last resort. Consider it when the problem began immediately after a known change and a suitable restore point exists. It is not the normal repair for this DLL.
If the file is found in System32, SysWOW64, a temporary folder, or an unrelated application directory, do not assume it is genuine. Record its full path, scan the system, and investigate the parent process before allowing it to run.
Why random DLL downloads are unsafe
A standalone DLL download can fail in several ways:
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- It may be the wrong version.
- It may be the wrong architecture.
- It may have been modified or bundled with malware.
- It may lack the dependencies the application also needs.
- It may place a similarly named file in the wrong directory.
- It may hide the real problem, such as a broken uninstall or stale startup entry.
There is no verified current official Microsoft download specifically for MMVCP70.dll. The safe sources are the original MusicMatch installer, a verified backup of that installer, or a trustworthy OEM recovery source. For Microsoft runtime problems involving a different filename, use Microsoft’s official Visual C++ Redistributable documentation, while checking that the package actually matches the application.
Frequently asked questions
Is mmvcp70.dll part of Windows?
It is not established as a protected Windows system file. Historical evidence strongly associates it with MusicMatch Jukebox.
Is mmvcp70.dll the same as msvcp70.dll or msvcp71.dll?
No. Similar names do not make these files interchangeable. Do not rename one file to create another.
Should I install the current Visual C++ Redistributable?
Not as a guaranteed fix. Current packages may repair a different Microsoft runtime dependency, but they are not verified replacements for this private MusicMatch DLL.
Should I put it in System32 or SysWOW64?
No. Keep a verified copy in the application directory expected by the original program.
Does regsvr32 fix mmvcp70.dll?
Normally no. This is not established as a COM or ActiveX registration DLL.
What does mmtask.exe have to do with the error?
Historical MusicMatch inventories list mmtask.exe beside MMVCP70.dll, and startup reports identify it as the component producing the error. If MusicMatch is no longer needed, disable its identifiable startup command.
What if MusicMatch is no longer installed?
Check Task Manager → Startup apps, Task Scheduler, and both startup folders. Disable or remove only entries that clearly identify MusicMatch, Yahoo Music, or mmtask.exe.
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Use them when there are broader Windows corruption symptoms. They are not the primary repair for an application-local MusicMatch DLL.
Could antivirus have removed the file?
Yes. Review Windows Security → Virus & threat protection → Protection history, but restore only a verified file from a trusted original installation.
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