Optimizernano.exe Virus – How to Remove It [Fix]

What is Optimizernano.exe?

Optimizernano.exe appeared on your Windows PC without a clear reason for being there, a security tool flagged it, or it appeared in Task Manager consuming resources. Read this guide carefully – security research confirms this file should be treated as a serious warning when found without an identifiable legitimate install.

Optimizernano.exe is a suspicious executable flagged by security researchers when it appears on a Windows PC without a clear installation source. The name combines “Optimizer” and “Nano” to suggest a legitimate system optimization utility, which is a naming technique used by PUP and malware developers to reduce suspicion when the file appears in Task Manager or the installed programs list. A legitimate system optimizer from a verified publisher installed deliberately by the user is not a threat. However, Optimizernano.exe appearing without a clear installation reason – in AppData, Temp, ProgramData, or alongside recently bundled software – is a red flag requiring immediate investigation and removal. The file path and how it arrived on the device are the decisive diagnostic factors.

How Did I Get Optimizernano.exe?

• Software bundling with unofficial free downloads – The most documented arrival route for PUPs using optimizer naming: a free program from a third-party site installs Optimizernano.exe as a bundled component through software bundling, with the optimizer executable placed in AppData or ProgramData rather than a standard Program Files location.
• A deceptive download prompt or fake update page – A redirect on a streaming or download site presents a fake optimization tool, system cleaner, or driver updater. Accepting the download installs Optimizernano.exe instead of or alongside the claimed tool.
• Cracked software or pirated application installers – Cracked application packages embed Optimizernano.exe as a secondary payload that installs silently alongside the cracked software.
• A rogue browser extension or adware component installing it – An existing adware component or rogue extension on the device can download and install Optimizernano.exe as a second-stage payload.

What Does Optimizernano.exe Do?

• Presents fake optimization scans to push paid upgrades – In its PUP variant, Optimizernano.exe performs a scan that returns fabricated results showing hundreds of problems requiring a paid license to fix. The scan results are not based on actual system issues.
• Collects system data and browsing behavior – The process collects device information and browsing data for data collection purposes, operating in the background through embedded trackers.
• Establishes persistence through startup entries – The file adds itself to startup via registry Run keys or scheduled tasks to relaunch on every system boot, regardless of whether the user opens it.
• May download additional unwanted components – Security research confirms Optimizernano.exe can act as a downloader, fetching additional adware or PUP components to expand the infection beyond the initial file.

How to Remove Optimizernano.exe [Fix]

• Check the file path immediately – Open Task Manager (Ctrl+Shift+Esc), find Optimizernano.exe, right-click, and select Open file location. If the path is in AppData, Temp, ProgramData, or any location outside a recognized Program Files installation with a verified publisher, the file is suspicious.
• Check installed programs by date – Open Settings, Apps, Installed apps, sort by install date. Look for Optimizernano or any unfamiliar program installed on the same date. Uninstall all of them.
• Remove startup entries – Open Task Manager, go to the Startup tab, and disable any Optimizernano.exe entry. Open Task Scheduler (taskschd.msc) and delete any task pointing to the file path.
• Run a full anti-malware scan – Use a dedicated anti-malware tool to catch all associated components and registry modifications. Manual file deletion alone is insufficient if startup and scheduled task entries are not also removed.
• Clear browsing data after removal – Use the All Time range to flush any cached data-collection scripts associated with the process.

Follow the complete removal guide below this article for the full step-by-step process.

Ventsislav Krastev

Ventsislav is a cybersecurity expert at SensorsTechForum since 2015. He has been researching, covering, helping victims with the latest malware infections plus testing and reviewing software and the newest tech developments. Having graduated Marketing as well, Ventsislav also has passion for learning new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management, Network Administration and Computer Administration of System Applications, he found his true calling within the cybersecrurity industry and is a strong believer in the education of every user towards online safety and security.

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Preparation before removing Optimizernano.exe.

Before starting the actual removal process, we recommend that you do the following preparation steps.

• Make sure you have these instructions always open and in front of your eyes.
• Do a backup of all of your files, even if they could be damaged. You should back up your data with a cloud backup solution and insure your files against any type of loss, even from the most severe threats.
• Be patient as this could take a while.

• Scan for Malware
• Fix Registries
• Remove Virus Files

Step 1: Scan for Optimizernano.exe with SpyHunter Anti-Malware Tool

1. Click on the "Download" button to proceed to SpyHunter's download page.

Download

Malware Removal Tool

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It is recommended to run a scan before purchasing the full version of the software to make sure that the current version of the malware can be detected by SpyHunter. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria.

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2. After you have installed SpyHunter, wait for it to update automatically.

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3. After the update process has finished, click on the 'Malware/PC Scan' tab. A new window will appear. Click on 'Start Scan'.

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4. After SpyHunter has finished scanning your PC for any files of the associated threat and found them, you can try to get them removed automatically and permanently by clicking on the 'Next' button.

If any threats have been removed, it is highly recommended to restart your PC.

Step 2: Clean any registries, created by Optimizernano.exe on your computer.

The usually targeted registries of Windows machines are the following:

• HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
• HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
• HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
• HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce

You can access them by opening the Windows registry editor and deleting any values, created by Optimizernano.exe there. This can happen by following the steps underneath:

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1. Open the Run Window again, type "regedit" and click OK.

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2. When you open it, you can freely navigate to the Run and RunOnce keys, whose locations are shown above.

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3. You can remove the value of the virus by right-clicking on it and removing it. Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.

Step 3: Find virus files created by Optimizernano.exe on your PC.

1.For Windows 8, 8.1 and 10.

For Newer Windows Operating Systems

1: On your keyboard press  + R and write explorer.exe in the Run text box and then click on the Ok button.

2: Click on your PC from the quick access bar. This is usually an icon with a monitor and its name is either “My Computer”, “My PC” or “This PC” or whatever you have named it.

3: Navigate to the search box in the top-right of your PC's screen and type “fileextension:” and after which type the file extension. If you are looking for malicious executables, an example may be "fileextension:exe". After doing that, leave a space and type the file name you believe the malware has created. Here is how it may appear if your file has been found:

N.B. We recommend to wait for the green loading bar in the navigation box to fill up in case the PC is looking for the file and hasn't found it yet.

2.For Windows XP, Vista, and 7.

For Older Windows Operating Systems

In older Windows OS's the conventional approach should be the effective one:

1: Click on the Start Menu icon (usually on your bottom-left) and then choose the Search preference.

2: After the search window appears, choose More Advanced Options from the search assistant box. Another way is by clicking on All Files and Folders.

3: After that type the name of the file you are looking for and click on the Search button. This might take some time after which results will appear. If you have found the malicious file, you may copy or open its location by right-clicking on it.

Now you should be able to discover any file on Windows as long as it is on your hard drive and is not concealed via special software.

Optimizernano.exe FAQ

What Does Optimizernano.exe Trojan Do?

The Optimizernano.exe Trojan is a malicious computer program designed to disrupt, damage, or gain unauthorized access to a computer system. It can be used to steal sensitive data, gain control over a system, or launch other malicious activities.

Can Trojans Steal Passwords?

Yes, Trojans, like Optimizernano.exe, can steal passwords. These malicious programs are designed to gain access to a user's computer, spy on victims and steal sensitive information such as banking details and passwords.

Can Optimizernano.exe Trojan Hide Itself?

Yes, it can. A Trojan can use various techniques to mask itself, including rootkits, encryption, and obfuscation, to hide from security scanners and evade detection.

Can a Trojan be Removed by Factory Reset?

Yes, a Trojan can be removed by factory resetting your device. This is because it will restore the device to its original state, eliminating any malicious software that may have been installed. Bear in mind that there are more sophisticated Trojans that leave backdoors and reinfect even after a factory reset.

Can Optimizernano.exe Trojan Infect WiFi?

Yes, it is possible for a Trojan to infect WiFi networks. When a user connects to the infected network, the Trojan can spread to other connected devices and can access sensitive information on the network.

Can Trojans Be Deleted?

Yes, Trojans can be deleted. This is typically done by running a powerful anti-virus or anti-malware program that is designed to detect and remove malicious files. In some cases, manual deletion of the Trojan may also be necessary.

Can Trojans Steal Files?

Yes, Trojans can steal files if they are installed on a computer. This is done by allowing the malware author or user to gain access to the computer and then steal the files stored on it.

Which Anti-Malware Can Remove Trojans?

Anti-malware programs such as SpyHunter are capable of scanning for and removing Trojans from your computer. It is important to keep your anti-malware up to date and regularly scan your system for any malicious software.

Can Trojans Infect USB?

Yes, Trojans can infect USB devices. USB Trojans typically spread through malicious files downloaded from the internet or shared via email, allowing the hacker to gain access to a user's confidential data.

About the Optimizernano.exe Research

The content we publish on SensorsTechForum.com, this Optimizernano.exe how-to removal guide included, is the outcome of extensive research, hard work and our team’s devotion to help you remove the specific trojan problem.

How did we conduct the research on Optimizernano.exe?

Please note that our research is based on an independent investigation. We are in contact with independent security researchers, thanks to which we receive daily updates on the latest malware definitions, including the various types of trojans (backdoor, downloader, infostealer, ransom, etc.)

Furthermore, the research behind the Optimizernano.exe threat is backed with VirusTotal.

To better understand the threat posed by trojans, please refer to the following articles which provide knowledgeable details.