WcInstaller.exe file information
The process known as Web Companion Installer or Web Companion appears to belong to software Web Companion Installer or Lavasoft Software Canada or Web Companion by Lavasoft (www.lavasoft.com).
Description: WcInstaller.exe is not essential for Windows and will often cause problems. WcInstaller.exe is located in a subfolder of the user's profile folder—typically C:\Users\USERNAME\AppData\Local\Temp\WcInstaller_exe_7240520251749596613772200\.
Known file sizes on Windows 10/11/7 are 578,280 bytes (33% of all occurrences), 744,600 bytes or 566,560 bytes. 
It is not a Windows system file. The program has no visible window. It is digitally signed.
Therefore the technical security rating is 70% dangerous, however you should also read the user reviews.
Recommended: Identify WcInstaller.exe related errors
If WcInstaller.exe is located in a subfolder of Windows folder for temporary files, the security rating is 76% dangerous. The file size is 349,256 bytes (50% of all occurrences) or 506,288 bytes.
The WcInstaller.exe file is not a Windows system file. The program has no visible window.
Uninstalling this variant:
In the event of any problems with WcInstaller.exe, you can also do the following:
- visit the vendor's support site
- uninstall the software Lavasoft Software Canada using the Uninstall a Program function of Windows Control Panel (Windows: Start, Settings, Control Panel, Uninstall a Program)
If WcInstaller.exe is located in a subfolder of C:\Windows, the security rating is 74% dangerous. The file size is 512,976 bytes.
The program has no visible window. WcInstaller.exe is not a Windows core file.
Important: You should check the WcInstaller.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 WcInstaller issues
The following programs have also been shown useful for a deeper analysis: ASecurity Task Manager examines the active WcInstaller process on your computer and clearly tells you what it is doing. A good Bantivirus tool detects whether the WcInstaller.exe file on your PC might be malware slowing down your system. Such unwanted programs are often not classified as viruses by other antivirus software and therefore go undetected.
A clean and tidy computer is the key requirement for avoiding PC trouble. 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 restore the original performance and remove unnecessary programs, you can 8reset your PC. Your personal files will remain intact, but any programs you installed will need to be reinstalled.
Other processes
mcupdate.exe acqhidcl.dat wblind.dll WcInstaller.exe shadow.exe floatled.exe devicenotifier.exe psdrt.exe wincpu.exe websearch.exe searchqudx.dll [all]
Score
User Comments
Harald Wünsch
Florian Ott
Anonym
Summary: Average user rating of WcInstaller.exe: based on 3 votes with 3 user comments. 2 users suspect danger. One user thinks WcInstaller.exe is dangerous and recommends removing it.