Home » EXE-M » How to Protect Your Computer from msi21.tmp Trojan Infection

msi21.tmp is a kind of malicious Trojan whose main purpose is to threaten the compromised system to a large extent. It reaches the system through the use of security exploits without any information to the genuine user and further damages the PC. The most lethal part of this Trojan is that once it enters into the computer, it starts changing the system and configuration settings such that it gets active as soon as the system boot up. To know more about this dangerous malware, you need to be aware of its properties.

msi21.tmp Information:

  • FileDescription: SubInstallation Application
  • LegalCopyright: Copyright (C) 2004-2005 Adobe Systems Inc. All Rights Reserved.
  • ProductName: SubInstallation Application
  • ProductVersion: 1, 0, 1, 9
  • Company: -
  • FileMd5: ec0ed430ea1f9eb396876084058e16e8
  • FileVersion: 1, 0, 1, 9
  • Memos: -
  • Download msi21.tmp fix tool
  • 90100822

What is msi21.tmp?

msi21.tmp is classified as a dangerous computer Trojan horse that can cause a series of computer problems, such as slow performance, system crashes and popping up ads, etc. This Trojan horse can sneak into your system without any awareness and consent via malicious websites, spam emails, free downloads and other means. It can pose a great threat to your personal information security, for it possesses the capacity of gathering your personal data and private information and then sending to the remote hackers. Apart from this, it can also delete system files, modify registry entries, download other malware onto your computer, etc. Therefore, it is strongly suggested that you remove the infection from your computer as possible as you can.

It must be a nightmare if computer has been infected with msi21.tmp virus. This virus can carry out significant troubles on the target machine. To be more specific, it can interrupt your web browsing activities aggressively by keep showing you unwanted pop-up ads or redirecting you to irrelevant web pages which you don’t want at all. Meanwhile, your computer will run noticeably slowly. It takes forever to launch a program or open a website on the browser. More worse, a Trojan Downloader is good at downloading and installing malicious software, including third-party malware and ransomware. If you don’t get rid of it instantly, cyber hackers may enable remote access to the infected system secretly with the help of this notorious Trojan horse in order to gather your vital financial information and other sensitive information for illegal tasks. Manual removal will become a better way to deal with this stubborn Trojan and save your computer in all aspects.

How did msi21.tmp gain access to your system?

the virus aims to infect windows system via kinds of access. Some misleading websites will pop up fake security warning telling your computer is in risk and recommending you to download the virus. Trojans could bring the rogue software easily to the computer with security flaws. So do not be surprised that the virus was suddenly installed in your computer without your notice.

Manual Removal Guides:

Manual removal is a complicated and risky process, so please back up all important data before making any changes on your computer. Here are some instructions to handle with the Trojan horse manually, and be cautious when going through the following steps.

Step1. Show Hidden Files

(1). Press Win+R to get run option
(2). Type in Control Panel and hit enter to get Control Panel
(3). Click on Appearance and Personalization link
(3). Click on Folder Options link
(4). Click on View tab in Folder Options window
(5). Tick Show hidden files, folders, and drives under Hidden files and folders tab
(6). Click Apply to effect then click OK at the bottom of the Folder Options window.

Step2. Stop virus processes in the Windows Task Manager.

(1). Press Ctrl+Alt+Del keys together to get Windows Task Manager
(2). Click More details

Step3. Remove all the malicious files registry entries through Registry Edit.

msi21.tmp is a malicious Trojan virus which implants itself to the infected computer secretly and makes your computer and other working process slowly during infection. It can install the itself into the computer system without your awareness and consciousness. To make matters worse, the Trojan is used as a tool for hackers to achieve hacking purpose to steal your information. It is recommended to remove it with a complete and fast procedure. Users can follow instruction here to have it manual deleted instantly.

(1). Using Registry Editor to delete all the related registry entries.

Press Win+R key together then Registry Editor will pop up.

(2). Find out and remove the associated files of msi21.tmp

Step 4. Clear all the malicious cookies in browsers.

* Google Chrome: Click on the Tools menu select Options Click ‘Under the bonnet’ tab locate ‘Privacy’ section browsing data’ button ‘Delete cookies and other site data’ to delete all cookies from the list.

* Internet Explorer: Click ‘Tools’ Click ‘safety’ ‘delete browsing history’ Tick ‘cookies’ box and click delete

* Firefox:: Click ‘Tools’ Click ‘Options’ Click ‘Privacy’ Click ‘remove individual cookies’

Solution: Remove msi21.tmp automatically (with SpyHunter)

Step A. Download removal tool SpyHunter
1) Click here or the icon below to download SpyHunter automatically.

2) Follow the instructions to install SpyHunter

Step B. Run SpyHunter to block msi21.tmp
Run SpyHunter and click ‘Malware Scan’ button to scan your computer, after detect this unwanted program, clean up relevant files and entries completely.

Step C. Restart your computer to take effect.

Approach two: automatically block / uninstall msi21.tmp with SpyHunter.

Step one: Download SpyHunter on your computer by clicking the icon below.

Step two: Following the prompts to automatically install SpyHunter
Step three: when the installation processes finish, run a full scan on the infected system to find out every threats, and then delete them completely.

Step four: Restart your computer again to make it effect.

msi21.tmp is categorized as a Trojan infection that can be attached to email attachments, programs you have downloaded, or even from your computer’s operating system vulnerabilities. It can make great changes on your computer settings once it is arrived. Thus, you will find computer is running out of order after being infected. This hazardous virus is capable of implanting malware into the infected computer, sending emails containing viruses to your contacts, corrupting Internet connection, collecting confidential data and even collapsing the computer system totally so you have to get rid of it without any hesitation.

msi21.tmp is located in:

  • c:\documents and settings\administrator\local settings\application data\yahoo!\messenger for vista\en-us\msi21.tmp
  • c:\documents and settings\skynet\desktop\commview for wifi-6.2-crc\commview for wifi\msi21.tmp
  • c:\documents and settings\heidi schruijer\bureaublad\jelleke\foto’s boek\jell en pap\msi21.tmp

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