installer.exe is a program which is probably NOT a virus. So, if installer.exe is on your computer, it is probably ok, and will NOT cause problems. Even if your PC is clean, we still advise you to run a good antivirus with a good detection rate, in order to yourself your PC against viruses and malware.
Usually, the default name and directory where this program is stored is
C:\WINDOWS\Temp\opera autoupdate\CProgram Files (x86)Opera\installing\installer.exe.
The MD5 fingerprint for this program is 23957cec7c21be507f2e52c5cd759081.
This program does NOT operate as a Windows service. This is normally a good sign.
This application uses the net to communicate. In this day and age this is quite normal. For example, most of the programs on your computer check for updates. For this, Internet communications are required.
This executable runs in 32-bit mode. It does not exploit the full set of features of modern computer CPUs. This ordinarily happens because the publishers did not bother to upgrade it to 64-bit code.
The description written in the file is Opera Installer.
File version stored as a property 43.0.2442.991.
Company Opera Software.
Legal copyright notice Copyright Opera Software 2017.
installer.exe has a digital signature. Today most legit programs are digitally signed.
The digital signature extracted from installer.exe is valid. This is very good.
Digitally signed by: Opera Software AS
Certificate's issuer name: DigiCert EV Code Signing CA (SHA2)
This executable does NOT have an uninstall command stored in registry.