OperaSetup.exe file information
The process known as Opera Installer belongs to software Opera web browser by Opera Software (www.opera.com).
Description: OperaSetup.exe is not essential for the Windows OS and causes relatively few problems. OperaSetup.exe is located in a subfolder of the user's profile folder—generally C:\Users\USERNAME\Downloads\.
Known file sizes on Windows 10/11/7 are 2,766,408 bytes (25% of all occurrences), 2,408,600 bytes, 962,928 bytes or 1,235,280 bytes. 
OperaSetup.exe is not a Windows system file. The file has a digital signature.
OperaSetup.exe is able to record keyboard and mouse inputs and monitor applications.
Therefore the technical security rating is 55% dangerous, but you should also take into account the user reviews.
Uninstalling this variant:
You can uninstall the program
Opera web browser, or ask the
software vendor for support. Click on
Opera web browser in
Windows Control Panel (Software or Programs section) to uninstall it.
Recommended: Identify OperaSetup.exe related errors
If OperaSetup.exe is located in C:\, the security rating is 46% dangerous. The file size is 2,800,152 bytes.
The program has a visible window. Windows Task Scheduler starts this process at a specific time. The OperaSetup.exe file is not a Windows core file. It is digitally signed.
OperaSetup.exe appears to be a compressed file.
If OperaSetup.exe is located in a subfolder of C:\, the security rating is 36% dangerous. The file size is 2,430,984 bytes.
The program is not visible. The file is not a Windows system file. The file has a digital signature.
OperaSetup.exe appears to be a compressed file.
Important: Some malware camouflages itself as OperaSetup.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the OperaSetup.exe process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.
Best practices for resolving OperaSetup issues
A clean and tidy computer is the key requirement for avoiding problems with OperaSetup. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.
Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.
To get your computer running as fast as it did on day one, you can 8reset your PC. Your personal files will remain intact, but any programs you installed will need to be reinstalled.
To help you analyze the OperaSetup.exe process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. A good Bantivirus software detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.
Other processes
nsetup.exe startuplauncher.bat 4wbrstub.dll OperaSetup.exe language_server_windows_x64.exe bonanzadealslive.exe memreduct64.exe megadownloader.exe cap3lak.exe incdrm.sys eyeicon.ico [all]
Score
User Comments
Rock
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Summary: Average user rating of OperaSetup.exe: based on 3 votes with 3 user comments. One user thinks OperaSetup.exe is essential for Windows or an installed application. One user thinks it's probably harmless. One user thinks it's neither essential nor dangerous. 3 users don't grade OperaSetup.exe ("not sure about it").