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NemuUninstallReport.exe is associated with MuMu Player 2.7.20.0, but its filename alone cannot prove that a copy on your PC is genuine or safe. A third-party inventory lists the file among that MuMu release’s installed files, while a Dr.Web malware description mentions a process path ending in the same name. That Dr.Web entry does not establish that every file called NemuUninstallReport.exe is malicious. To assess your copy, check its complete path, whether MuMu Player is installed, its digital signature, and the result of a current security scan. For errors, use the exact MuMu uninstall or installation procedure that matches your message instead of deleting the executable or the emulator folder at random.
What is NemuUninstallReport.exe?
NemuUninstallReport.exe appears in a third-party inventory of files installed with MuMu Player version 2.7.20.0. The inventory records the file at approximately 2.53 MB for that particular release. This supports an association with MuMu Player, not authentication of every file carrying the same name.
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The official MuMu help material focuses on installing and removing the emulator rather than documenting this executable’s internal function. The name suggests a component used during uninstall or removal reporting, but that purpose is not confirmed by an official technical description. Treat the filename as a clue that needs verification, not as a safety certificate.
Is NemuUninstallReport.exe safe?
There is no responsible yes-or-no verdict based only on the name. A Dr.Web malware-family description, entered in its database on April 1, 2022, and with the description added on April 3, 2022, includes a command that terminates a process at an emulator-related path ending in NemuUninstallReport.exe. That is a reference inside a malware description, not a laboratory identification of every executable with this filename.
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Use several independent signals together:
| Evidence | What it can tell you | What it cannot prove |
|---|---|---|
| Complete file path | Whether the file is in a MuMu installation directory you recognize or in an unexpected location | That a file is clean merely because it is in a familiar-looking folder |
| MuMu Player presence | Whether the executable has a plausible reason to exist on the computer | That an installed copy has not been replaced or modified |
| Digital signature | Whether Windows shows a valid signer and whether the file has been altered since signing | A guarantee that the signed program is harmless in every context |
| Current security-software scan | Whether your installed security product detects the file or its behavior | Proof of safety when the scan is clean; detection engines and threats change |
| File size or version match | Whether it resembles the approximately 2.53 MB inventory entry for MuMu Player 2.7.20.0 | A universal expected size or a safety test |
No current official hash, filename-specific authentication method, or authoritative functional description was identified for this executable. If a security product flags the file, follow that product’s quarantine and recovery instructions rather than launching it to see what happens. If MuMu Player is not expected on the computer, or the file is in a location unrelated to the emulator, investigate the installation and scan results before making a deletion decision.
How do I check my copy of NemuUninstallReport.exe?
These checks let you assess the actual file on your Windows installation without assuming that a matching name is legitimate.
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- Find the full path. In Task Manager, right-click the process if it is running and choose Open file location. If it is not running, use the path shown in the error dialog, a shortcut, or the MuMu installation record. Copy the complete path, including the drive letter and every folder.
- Confirm the software context. Check Settings → Apps → Installed apps (or Control Panel → Programs and Features on older Windows interfaces) for MuMu Player. A recognized MuMu installation makes the association more plausible; it does not authenticate the executable.
- Inspect the signature. Right-click the file, select Properties, and open Digital Signatures if that tab exists. Select the signer, choose Details, and verify that Windows reports the signature as valid. A displayed publisher name by itself is not proof of safety, and an unsigned file is not automatically malware, but both results are useful context.
- Scan the file. Use a trusted, up-to-date security product and scan the individual file or its containing folder. Do not disable protection as a routine step just to make the file run. If the scanner quarantines it, preserve the detection name and path for later troubleshooting.
- Record the circumstances. Note whether the file appeared during MuMu installation, removal, startup, or a crash; record the Windows edition and build, MuMu version, exact error text, and the file path. Those details distinguish a broken uninstall from an unrelated executable.
Do not execute an unfamiliar copy merely to test it. If the path, signer, installed-software list, and scan result disagree, leave the file isolated while you investigate rather than relying on the filename.
How do I fix a MuMu uninstall or incomplete-removal error?
MuMu’s help center recommends uninstalling through Windows’ Programs and Features interface and warns against deleting the installation folder directly. Its explanation is explicit: “The wrong way of uninstalling MuMuPlayer will result in an error when reinstalling the emulator.” The sequence below follows that approach.
Use Programs and Features first
- Save any emulator work and close MuMu windows.
- Press Windows + R, enter
appwiz.cpl, and press Enter to open Programs and Features. You can also open Control Panel and select Programs and Features. - Select MuMuPlayer (the displayed product name can vary by release), choose Uninstall, and complete the vendor’s prompts.
- Restart Windows if the uninstaller requests it, then check whether the application entry and the original installation directory are gone.
Do not remove the program directory first. Deleting files manually can leave services, uninstall records, or shared components behind and can create a new installation error.
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If Windows says the removal is incomplete
MuMu’s documented recovery route is to reinstall over the existing installation and then uninstall it through Control Panel. Reinstalling restores missing uninstaller files without requiring you to erase the folder blindly.
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- After the reinstall completes, open Programs and Features again and run the MuMu uninstall entry.
- If the normal entry still fails, MuMu’s article describes restoring the uninstaller in the original Nemu installation folder and running
uninstall.exefrom that folder.
The same article documents stopping and deleting the NemuDrv service for a specific incomplete-removal case. Service changes affect Windows system configuration; use the current MuMu instructions for that exact case, confirm that MuMu processes are closed, and do not remove an unrelated service with a similar name.
When the uninstaller reports that files are in use
- Close MuMu windows and any launcher or update utility associated with it.
- In Task Manager, end only clearly identified MuMu processes that are preventing removal; avoid terminating unknown Windows processes.
- Restart Windows and retry the Control Panel uninstall before attempting any advanced service cleanup.
- If security software reports a threat, follow its quarantine guidance first and retain the detection details for support.
How do I fix MuMu installation errors involving NemuUninstallReport.exe?
MuMu’s installation-error guide, dated July 1, 2025, maps remedies to the exact code shown by the installer. The correct fix depends on that code, so copy the complete message before changing anything.
Check free space
Insufficient disk space is one documented cause. Open File Explorer → This PC, check the free space on the destination drive, and make enough room for the installer and the emulator’s working files. Do not assume that deleting the NemuUninstallReport.exe file will create a valid installation; it can leave the previous installation in a more broken state.
Validate the installation path
An abnormal, unavailable, or inaccessible path can trigger an installation error. Confirm that the destination drive is connected, that the folder can be opened in File Explorer, and that your Windows account can create and modify files there. If the installer allows a different destination, choose a normal local path with adequate space and record the new location.
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Release files held by another process
The guide also lists files being occupied during setup. Close MuMu and related launchers, then use Task Manager to end only processes you can positively identify as part of MuMu. Retry the installer after a restart if the lock persists.
Follow code-specific security guidance carefully
Some installer codes may include a security-software-related remedy, but disabling protection should not be a routine first step. Read the procedure for your exact code, weigh the risk, and restore normal protection immediately after any narrowly scoped troubleshooting step. Never treat a temporary change as evidence that NemuUninstallReport.exe is safe.
How can I reinstall MuMu without losing emulator data?
MuMu describes two different reinstall goals: installing over the current copy to retain existing emulator data, or performing a clean reinstall to address corrupted files and installation problems. Before removing anything, back up data you need, including applications, game progress, and settings.
Install over the current copy
Choose the existing installation location when MuMu’s installer offers an over-install option. This route is intended to keep the current emulator data while replacing missing or damaged program files. It is the safer first attempt when your priority is preserving the virtual devices.
Perform a clean reinstall
Use a clean reinstall when the existing files are corrupted or the over-install route does not resolve the code. First export or otherwise back up the emulator data you need, then uninstall through Programs and Features. Only after the uninstall completes should you remove residual folders that the current MuMu instructions identify as part of a clean removal, and then install again.
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Data-preservation behavior can vary by MuMu release and by where virtual devices are stored. If the installer does not clearly state that data will remain, assume a clean removal could erase it and make a backup before proceeding.
What should I do if the file is outside the MuMu folder?
An unexpected location is a reason to investigate, not a conclusive malware verdict. First record the path and check whether MuMu Player is installed or was recently installed. Then inspect the signature and scan the file with current security software while leaving it unopened.
- If the scan is clean but the file is unrelated to any expected software, submit the path and hash to your security provider or Windows support for a second opinion rather than deleting system files at random.
- If the scan detects a threat, quarantine it through the security product and follow its remediation and restart instructions.
- If the file reappears after removal, check startup entries, scheduled tasks, and the parent application that created it; do not repeatedly delete the copy without identifying that source.
- If MuMu is unwanted, remove it through Programs and Features, then restart and rescan the computer.
Because no current official hash or filename-specific authentication method is established for NemuUninstallReport.exe, a clean scan or matching size should be treated as evidence to weigh, not as a guarantee.
When should I stop troubleshooting and seek help?
Escalate when the exact error code is missing, the file has an invalid or unexpected signature, security detections disagree, or uninstall attempts repeatedly recreate the executable. Provide support with the full path, MuMu version, Windows edition and build, exact error text, signature status, scan detection name, and the steps already attempted. Avoid sending the executable itself unless a trusted support channel specifically requests it and explains how it will be handled.
Keep a backup of emulator data before further reinstall attempts. If Windows is unstable, multiple unrelated files are being flagged, or the computer shows signs of broader compromise, disconnect it from sensitive accounts and use a trusted security professional’s incident-response guidance rather than continuing with ad-hoc file deletion.
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Frequently asked questions
Can the 2.53 MB size confirm that my file is genuine?
No. The approximately 2.53 MB figure comes from a version-specific inventory of MuMu Player 2.7.20.0, not from an official specification or a security test. Updates, compression, language files, and tampering can all change a file’s size.
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No. The entry describes a malware family using a process path that ends with this filename; it does not identify every file with that name as malicious. Your own file’s path, signature, and current scan result are required for a meaningful assessment.
Can I delete NemuUninstallReport.exe to remove MuMu Player?
Do not use manual deletion as the normal uninstall method. Removing the executable or its folder can leave services and uninstall records behind; use Programs and Features, then follow MuMu’s incomplete-removal procedure if the standard uninstall fails.
What details should I include when asking for troubleshooting help?
Include the exact error code and wording, Windows edition and build, MuMu version, complete file path, whether MuMu is currently installed, digital-signature status, and the security product’s detection name if any. A screenshot of the dialog and the time the problem began can help support distinguish an installer lock from a damaged uninstall record.
Frequently Asked Questions
Can the 2.53 MB size confirm that my file is genuine?
No. The approximately 2.53 MB figure comes from a version-specific inventory of MuMu Player 2.7.20.0, not from an official specification or a security test. Updates, compression, language files, and tampering can all change a file’s size.
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1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsDoes the Dr.Web entry mean my MuMu installation is infected?
No. The entry describes a malware family using a process path that ends with this filename; it does not identify every file with that name as malicious. Your own file’s path, signature, and current scan result are required for a meaningful assessment.
Can I delete NemuUninstallReport.exe to remove MuMu Player?
Do not use manual deletion as the normal uninstall method. Removing the executable or its folder can leave services and uninstall records behind; use Programs and Features, then follow MuMu’s incomplete-removal procedure if the standard uninstall fails.
What details should I include when asking for troubleshooting help?
Include the exact error code and wording, Windows edition and build, MuMu version, complete file path, whether MuMu is currently installed, digital-signature status, and the security product’s detection name if any. A screenshot of the dialog and the time the problem began can help support distinguish an installer lock from a damaged uninstall record.
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