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x86_pluginhost_lenovo.modern.imcontroller.pluginhost.companionapp.exe appears to refer to a Lenovo System Interface Foundation plugin-host component, but that exact filename spelling is not confirmed in the available package records. Lenovo installation evidence names Lenovo.Modern.ImController.PluginHost.CompanionApp.exe and places 32-bit and 64-bit copies under Lenovo’s ImController folders. The name alone cannot prove that a file on your computer is genuine or safe. Confirm its complete path, inspect its digital signature, scan it with Windows Security, and use Lenovo’s official support page for your exact model if the component is missing or repeatedly failing. Do not delete the executable or disable the ImController service as a first response.
What is x86_pluginhost_lenovo.modern.imcontroller.pluginhost.companionapp.exe?
It is most likely a path-derived or transformed reference to Lenovo’s Modern ImController CompanionApp plugin host. A Microsoft Q&A installation-log reproduction from February 13, 2021, lists Lenovo.Modern.ImController.PluginHost.CompanionApp.exe among the files installed with Lenovo System Interface Foundation. The same log shows separate 32-bit and 64-bit plugin-host folders. A third-party reproduction of the package file list also includes the matching executable and records package metadata of 04/19/2019, 1.1.18.1; that date is package metadata, not proof of the current version on your PC.
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A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11The exact string in the question, with the x86_pluginhost_lenovo.modern.imcontroller.pluginhost.companionapp.exe spelling, was not confirmed as the literal name of a Lenovo binary. It may be generated by an installer, an error-reporting system, a path parser, or a security product. Treat it as an identifier that needs checking rather than as a definitive product name.
What does the Lenovo ImController component do?
Lenovo System Interface Foundation supplies interfaces used by Lenovo applications for hardware and system features. The service description reproduced in the installation log lists system power management, system optimization, driver and application updates, and system settings, including functions used by Lenovo Companion, Lenovo Settings and Lenovo ID.
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“The Lenovo System Interface Foundation Service provides interfaces for key features such as: system power management, system optimization, driver and application updates, and system settings to Lenovo applications including Lenovo Companion, Lenovo Settings and Lenovo ID.”
The same description warns that Lenovo applications may not work properly if the service is disabled. That does not mean every error is caused by the service, but it is a reason to investigate the installation and signature before removing anything.
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| Folder shown in the 2021 installation log | Architecture represented | Executable listed |
|---|---|---|
C:WindowsLenovoImControllerPluginHost86 |
x86 (32-bit) | Lenovo.Modern.ImController.PluginHost.CompanionApp.exe |
C:WindowsLenovoImControllerPluginHost |
x64 (64-bit) | Lenovo.Modern.ImController.PluginHost.CompanionApp.exe |
These paths document one Windows 10 version 20H2 installation, not a universal rule for every Lenovo model, Windows edition or software release. A 64-bit Windows installation can still contain an x86 folder because Lenovo applications or plugins may be 32-bit.
Is x86_pluginhost_lenovo.modern.imcontroller.pluginhost.companionapp.exe safe?
It can be legitimate when it belongs to a Lenovo System Interface Foundation installation, resides in a Lenovo ImController directory and has a valid publisher signature. However, the filename by itself is not a safety verdict. Malware can copy a familiar name, and a damaged or incomplete Lenovo installation can produce the same error without any malware being involved.
Check the complete file path
- When an error appears, copy the entire path shown in the dialog or event log. If no path is shown, open Task Manager while the process is running, right-click the process and choose Open file location.
- Compare the location with the package-consistent examples
C:WindowsLenovoImControllerPluginHost86andC:WindowsLenovoImControllerPluginHost. A different path does not automatically prove malicious activity, because vendors can change layouts between releases, but it requires extra verification. - Inspect the file name itself. The package evidence uses
Lenovo.Modern.ImController.PluginHost.CompanionApp.exe; a string that only resembles it, contains unexpected characters, or appears in a user-writable temporary folder deserves caution.
Inspect the digital signature
- Right-click the executable, select Properties, and open the Digital Signatures tab.
- Select the listed signature, choose Details, and confirm that Windows reports the signature as valid. Review the signer identity and the certificate path rather than relying on the file name.
- Use View Certificate to check validity dates and the issuing chain. No current Lenovo certificate thumbprint or signature reference has been established for this particular executable, so do not treat a certificate detail as a substitute for checking the source and path.
If the Digital Signatures tab is absent, the signature is invalid, or the publisher is unknown, do not run the file repeatedly. Preserve the path and error details, scan the file, and obtain a replacement only from Lenovo’s official support channel for the computer’s exact model.
Scan the file and the computer
Open Windows Security, go to Virus & threat protection, select Scan options, then choose Custom scan and select the folder containing the executable. A full scan is appropriate when the file is in an unexpected location, has no valid signature, or other unfamiliar programs are appearing. Security software can identify a threat, but a clean scan still does not prove that a strangely named or misplaced file is an authentic Lenovo component.
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Why does Lenovo ImController PluginHost fail?
The package records establish what the component is associated with, not the cause of an individual error. Several explanations are possible, and the exact Windows message and file path determine which branch is sensible.
Incomplete or damaged Lenovo installation
A failed feature update, interrupted Lenovo software installation, disk error or accidental cleanup can leave the plugin host missing while a Lenovo application or service still tries to start it. “File not found,” “side-by-side configuration is incorrect” and application-start failures fit this general pattern, but the available package evidence does not diagnose any particular message.
Architecture or version mismatch
The x86 and x64 copies are separate package entries. A Lenovo application expecting the 32-bit host may fail if only the 64-bit files remain, while replacing one copy with a file from a different release can create version mismatches. Keep the architecture and package version aligned with the Lenovo software installed on that model.
ImController service dependency
Lenovo applications use the System Interface Foundation service for the interfaces described above. If the service is stopped, set to an inappropriate startup mode, or damaged, Lenovo utilities may report plugin-host errors. This is a service-dependency problem, not evidence that the executable itself is a virus.
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Windows component corruption
If unrelated applications also crash, Windows components may be damaged. In that situation, repairing the Lenovo package alone may not solve the problem. Use the built-in Windows integrity checks described below and record their results.
Impersonation or unwanted software
An executable with a Lenovo-like name in a download, temporary, user-profile or random system folder is not package-consistent evidence. An invalid signature, repeated security alerts, unexpected network activity or several newly installed programs should be handled as a security investigation, not as a routine Lenovo repair.
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How do I fix x86_pluginhost_lenovo.modern.imcontroller.pluginhost.companionapp.exe errors?
Work through these steps in order. The first steps establish whether you are repairing a Lenovo component or investigating an impostor; only then should you replace software.
1. Capture the exact error before changing anything
- Copy the complete message, including any error code, module name and path. Take a screenshot if the dialog disappears quickly.
- Note which Lenovo application was opening, whether the error started after a Windows or Lenovo update, and whether other programs are affected.
- In Event Viewer, open Windows Logs and Application, then inspect entries at the time of the failure. Record the faulting application and faulting module; do not delete logs while troubleshooting.
2. Verify location, signature and scan results
Apply the path, signature and Windows Security checks above. If the file is unsigned or located outside a Lenovo installation directory, do not “repair” it by downloading a similarly named executable from a file-sharing or driver site. Quarantine or remove a confirmed threat through your security product, and seek professional help if you cannot determine whether the file is malicious.
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3. Check the Lenovo System Interface Foundation service
- Press Win+R, enter
services.msc, and press Enter. - Look for Lenovo System Interface Foundation Service or an ImController-related service. The displayed name can vary by Lenovo package version.
- Open Properties. If it is stopped, use Start; if it is already running, use Restart as a diagnostic step. Leave its startup setting at the vendor-installed value unless Lenovo support tells you otherwise.
- Try the Lenovo application again and record whether the same error returns.
Do not permanently disable the service merely because the executable appears in a startup list. Lenovo’s reproduced service description explicitly warns that Lenovo applications may not work properly when it is disabled.
4. Install the correct Lenovo package for the exact model
Use Lenovo’s official support site for the computer’s exact model and region. Enter the model or serial number, open the drivers and software area, and look for Lenovo System Interface Foundation, ImController or the related Lenovo system-interface package. Match the package to the installed Windows edition and architecture, close Lenovo utilities, run the installer as an administrator, and restart when it requests one.
This is a practical recovery route, not a published Lenovo repair sequence for the unusual filename. The available evidence does not establish a current package version, a universal installer name or a current signature hash. Do not substitute a generic third-party driver or “DLL fixer,” and do not copy an executable from another PC.
5. Apply pending Windows updates, then test again
Open Settings > Windows Update, install updates offered for the computer, restart, and test the Lenovo function again. If the failure began immediately after an update, note the update’s date and use Lenovo support or Microsoft recovery options rather than deleting individual system files. Keep the original error text so support can distinguish an update regression from a damaged installation.
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6. Repair Windows components when other programs fail too
Use an elevated Windows Terminal or Command Prompt for the following built-in checks. They address general Windows corruption, not a Lenovo-specific executable, so run them when the symptoms extend beyond one Lenovo utility.
- Open Windows Terminal (Admin) from the Start menu.
- Run
DISM /Online /Cleanup-Image /RestoreHealthand wait for it to complete. - Run
sfc /scannow. - Restart Windows and test the application. Keep the completion messages if you need to contact Lenovo or Microsoft support.
Do not interrupt either command or delete files from C:WindowsWinSxS or the ImController folders to force completion.
7. Use System Restore or vendor recovery only when the timing is clear
If the error began after a known software installation and a restore point predates it, Windows System Restore can roll back system files and settings without acting as a Lenovo-specific reinstall. Review the affected programs shown by the restore wizard before confirming. A full Lenovo recovery or Windows reset is a last resort because it can remove applications and personal settings; back up data first and use the manufacturer’s documented recovery instructions.
8. Escalate when the evidence points to hardware or security trouble
- Contact Lenovo support when the correct model package will not install, the service repeatedly stops, or the same component fails after a clean package installation.
- Contact your security provider or a qualified technician when the file is unsigned, appears outside expected locations, is repeatedly recreated, or triggers detections.
- Investigate storage and memory problems when installers report read/write errors or multiple unrelated files become corrupt.
Give support the exact model, Windows version, complete path, signature result, error text, Event Viewer details and the steps already attempted. That information is more useful than reporting only the long filename.
Can I disable or delete the executable?
Do not delete it as a first fix, and do not permanently disable the ImController service solely because the name looks unfamiliar. The service supports Lenovo applications and settings, and the reproduced service description warns that disabling it can stop those applications from working correctly.
If you need to isolate a conflict, create a restore point, document the original service startup setting, and make only a temporary change through services.msc. Stop testing if Windows or Lenovo functions deteriorate, restore the original setting, and continue with signature verification and an official package reinstall. Renaming or deleting the executable can turn a recoverable installation problem into a harder repair.
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How can I tell a normal package problem from a suspicious file?
| Observation | More consistent with a Lenovo package | Reason for caution |
|---|---|---|
| Location | Under a Lenovo ImController PluginHost or PluginHost86 directory documented by an installation log | Temporary, download, user-profile or unrelated random directory |
| Signature | Windows reports a valid signature with a Lenovo-identifying publisher | No signature, an invalid signature or an unknown publisher |
| Symptoms | One Lenovo utility fails after an update or incomplete installation | Many unrelated programs fail or security alerts appear |
| Next action | Repair the exact-model Lenovo package and check the service | Scan and investigate before running, replacing or deleting the file |
This comparison is a decision aid, not an authenticity certificate. The reviewed package records do not provide a current Lenovo hash or a universal certificate thumbprint.
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What should you conclude about this filename?
The strongest identification is a Lenovo System Interface Foundation CompanionApp plugin host, with x86 and x64 package copies documented in a 2021 Windows installation log. The unusual x86_pluginhost_lenovo.modern.imcontroller.pluginhost.companionapp.exe spelling is not itself verified, and neither the name nor the presence of an ImController folder proves safety. Verify the path, signature and scan result; keep the service enabled while you troubleshoot; and obtain any replacement package through Lenovo’s official support channel for the exact device.
Frequently Asked Questions
Why does Windows show both a 32-bit and a 64-bit Lenovo plugin host?
A 64-bit edition of Windows can run 32-bit Lenovo applications, so the package may install an x86 host alongside its x64 counterpart. The two folders can be used by different Lenovo utilities and should not be merged or replaced with files from another release.
What if the Digital Signatures tab is missing from the file properties?
Treat the absence of a signature as an unresolved authenticity issue, not as proof of malware. Record the full path, scan the file with Windows Security, and obtain the component again from the exact model’s official Lenovo support page rather than downloading a copy from a file-sharing site.
Can a Windows update make the Lenovo plugin host stop working?
It is possible for an update or an interrupted installation to leave a dependent Lenovo utility unable to start, but the filename alone cannot establish that cause. Note when the problem began, install pending updates, and use the model-specific Lenovo package or support channel if the failure remains.
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Provide the computer’s exact model, Windows edition and build, complete executable path, digital-signature result, full error text, Event Viewer entry and whether the ImController service starts. Including those details helps support distinguish a missing package from a broader Windows or security problem.
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