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What does the installer.exe file do?

The installer.exe process is also known as Opera Installer or, as the case may be, Installation File and is a part of LookThisUp or, as the case may be, Bitdefender (Version 2012). This software is produced by adaware or, as the case may be, Opera Software (www.opera.com). An obsolete or defective version of installer.exe can cause problems for your computer that can range from slowness to error messages such as these:

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What you should know about installer.exe Opera Installer

installer.exe is not a Windows system file and is known to frequently cause computer problems. Installer.exe is found in a subdirectory of C:\Windows. Frequently occurring are file sizes such as 864,256 bytes (50% of all these files) or, as the case may be, 1,502,968 bytes.
This file is no part of Microsoft Windows. This installer.exe process is connected to a server on the Internet or in your local network. This process does not have a visible window, and does not appear on the taskbar. For this reason, 83% of all experts consider this file to be a possible threat. The probability that it can cause harm is high.

If you see this file on your hard drive or in Windows Task Manager, please make sure that it is not a malicious variant. It's a fact that many trojans try to cloak their true identity by calling themselves installer.exe. With the above information or by using tools like Security Task Manager you can determine if, in your case, the file is an undesirable variant.

What do other computer users say about installer?

wont remove of task manager
keeps turning itself back on in my DEP list, xp32, hard to google "installer.exe"
It grabs cpu resources often and stops oporation of other programs. Must initiate task manager to unlock.
M. Patterson
when you installing World of Warcraft this process is in task manager it is important process
good guy

Summary: One user judges installer.exe to be an essential file that should not be touched. 2 users consider it harmless. For this reason, one user has already deleted installer.exe. source: file.net

How to uninstall LookThisUp or Bitdefender

To remove Opera Installer from your computer, please follow the manual instructions below or use an automatic uninstaller product.

  1. Click the Windows Start Button. You find it in the lower left corner of the taskbar.
  2. Type the word uninstall.
  3. Click Add or remove programs.
  4. Now locate LookThisUp or Bitdefender in the list of displayed applications.
  5. Click the program, and then click Uninstall.
Remove software in Windows 10
installer.exe Opera Installer fix

How to tell if installer.exe (Opera Installer) was uninstalled cleanly

After uninstalling, restart your computer. Then start Windows Explorer and see if there is still a folder with the name of the software under C:\Program Files. Be sure to check the Registry as well for remnants of Opera Installer. To do this, start "Regedit", then look under "HKEY_LOCAL_MACHINE" > "Software" for Opera Installer or the name of the producer. Always keep in mind that only a computer professional should ever directly delete entries in the Windows Registry.

What to do if a program does not uninstall

The easiest way to remove any kind of software cleanly and accurately is to use an uninstaller tool. Because the uninstaller automatically creates a backup, there is no risk of anything going wrong.

Last but not least

If Windows not working quite right for you, or if startup is taking a long time, or installer.exe is causing problems for you, a good Windows diagnostic tool may very well help. This is especially effective when it comes to older computers that have accumulated vast quantities of "garbage data" as the result of many software installs and uninstalls.

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