OInstall.exe Virus



OInstall.exe is a Trojan horse infection known for its multifunctional malicious abilities. Hackers can use OInstall.exe to establish remote control over a given computer and to run various harmful processes and tasks on it without the victim’s knowledge.

OInstall.exe Virus

The OInstall.exe Virus

As far as history is concerned, the term Trojan horse comes from the ancient Greek myth about the wooden horse used to conquer the city of Troy. When it comes to computing, a Trojan is a particularly dangerous, very common and very nasty virus, which – much like its historical equivalent – is mounted stealthily into the system and can be used for various criminal purposes. This is especially true for OInstall.exe which is one of the latest representatives of this notorious malware family.

What can hackers use OInstall.exe for?

Depending on their criminal intentions, the hackers who stand behind OInstall.exe can use it for a number of malicious activities. Your files could be in danger if the crooks want to have fun with them and delete, replace, modify, duplicate or corrupt them. It may also be considered amusing for the hackers to just crack, hack and crash some of the system’s processes and software. But compared to what is next, this is probably the least disturbing thing that can happen if you have OInstall.exe on your machine.

One of the most dreadful uses of Trojans is for the distribution of Ransomware threats. Usually, the Trojans are used to find weaknesses in the system which can be exploited by other malware. In the case with Ransomware, the Trojan acts as a backdoor and ensures the swift insertion of the infection into the target computer.

Another fearful ability of Trojans is to access and steal all types of data they want. Such threats can collect banking information so you can be robbed, account information so hackers can steal your identity, keystrokes so that your passwords are revealed, as well as any business or personal information that you keep on your computer. This can happen when the malware secretly activates your camera and microphone and monitors your activities, conversations, and correspondence.

The fact that OInstall.exe could be used for so many malicious activities makes it an unpredictably dangerous piece that needs to be removed at once.

Can Trojans be avoided or deleted?

It is possible to avoid Trojan threats and other serious infections or at least limit your chances of landing one if you follow some basic safety rules. For instance, you should stick only to reliable and reputed web content sources and avoid anything like cracked program packages, torrents, pirated materials, web pages with sketchy ads and links, spam messages and e-mails from unfamiliar senders. This is the foundation of safe web surfing and is essential to your online safety. Investing in a premium-class antivirus program to detect and remove harmful programs on time is another very important thing. You’ll find a lot of professional system security tools online but if you need a trusted one right now, make sure you check the program on this page.


Name OInstall.exe
Type Trojan
Danger Level  High (Trojans are often used as a backdoor for Ransomware)
Symptoms  Trojans operate secretly and normally don’t trigger any visible symptoms of their presence in the system.
Distribution Method Spam email attachments and malicious web links are common distribution methods for Trojans.
Detection Tool

Remove OInstall.exe Virus

If you have a Windows virus, continue with the guide below.

If you have a Mac virus, please use our How to remove Ads on Mac guide.

If you have an Android virus, please use our Android Malware Removal guide.

If you have an iPhone virus, please use our iPhone Virus Removal guide

OInstall.exe Virus

Some of the steps will likely require you to exit the page. Bookmark it for later reference.

Reboot in Safe Mode (use this guide if you don’t know how to do it).

OInstall.exe Virus


Press CTRL + SHIFT + ESC at the same time and go to the Processes Tab. Try to determine which processes are dangerous. 

OInstall.exe Virus

Right click on each of them and select Open File Location. Then scan the files with our free online virus scanner:

OInstall.exe Virus
Drag and Drop Files Here to Scan
Maximum file size: 128MB.

This scanner is free and will always remain free for our website's users. You can find its full-page version at: https://howtoremove.guide/online-virus-scanner/

Scan Results

Virus Scanner Result
OInstall.exe VirusClamAV
OInstall.exe VirusAVG AV
OInstall.exe VirusMaldet

After you open their folder, end the processes that are infected, then delete their folders. 

Note: If you are sure something is part of the infection – delete it, even if the scanner doesn’t flag it. No anti-virus program can detect all infections. 

OInstall.exe Virus

Hold together the Start Key and R. Type appwiz.cpl –> OK.

OInstall.exe Virus

You are now in the Control Panel. Look for suspicious entries. Uninstall it/them. If you see a screen like this when you click Uninstall, choose NO:

OInstall.exe Virus

OInstall.exe Virus

Type msconfig in the search field and hit enter. A window will pop-up:

OInstall.exe Virus

Startup —> Uncheck entries that have “Unknown” as Manufacturer or otherwise look suspicious.

  • Remember this step – if you have reason to believe a bigger threat (like ransomware) is on your PC, check everything here.

Hold the Start Key and R –  copy + paste the following and click OK:

notepad %windir%/system32/Drivers/etc/hosts

A new file will open. If you are hacked, there will be a bunch of other IPs connected to you at the bottom. Look at the image below:

OInstall.exe Virus

If there are suspicious IPs below “Localhost” – write to us in the comments.

OInstall.exe Virus

Type Regedit in the windows search field and press Enter.

Once inside, press CTRL and F together and type the virus’s Name. Right click and delete any entries you find with a similar name. If they don’t show up this way, go manually to these directories and delete/uninstall them:

  • HKEY_CURRENT_USER—-Software—–Random Directory. It could be any one of them – ask us if you can’t discern which ones are malicious.
    HKEY_CURRENT_USER—-Software—Microsoft—-Windows—CurrentVersion—Run– Random
    HKEY_CURRENT_USER—-Software—Microsoft—Internet Explorer—-Main—- Random

If the guide doesn’t help, download the anti-virus program we recommended or try our free online virus scanner. Also, you can always ask us in the comments for help!


About the author


Lidia Howler

Lidia is a web content creator with years of experience in the cyber-security sector. She helps readers with articles on malware removal and online security. Her strive for simplicity and well-researched information provides users with easy-to-follow It-related tips and step-by-step tutorials.

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