The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the GoogleUpdate.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.
The process known as Google Installer or Google Update or Google Update Service or Google Update Service (gupdate)
belongs to software Google Update or Google Update Service (gupdate) or Google Update Service (gupdatem) or Google or Google Update Service (gupdate1c9d97449a805a9) or PoserContent2012 or Google Update Service (gupdate1c963ca7808cd9a) or Dimension Pro Free Expansion
by Google (toolbar.google.com).
Description: GoogleUpdate.exe is not essential for Windows and will often cause problems. GoogleUpdate.exe is located in a subfolder of "C:\Program Files".
Known file sizes on Windows 8/7/XP are 133,104 bytes (42% of all occurrences), 136,176 bytes and 11 more variants.
It is not a Windows system file. The GoogleUpdate.exe file is a Verisign signed file. The file has a digital signature. The program has no visible window. Therefore the technical security rating is 25% dangerous, however you should also read the user reviews.
The developer Google provides a website for help  and for updates . There is also an uninstaller (Control Panel ⇒ Add/Remove programs ⇒ Google Chrome or Google Earth).
Recommended: Identify GoogleUpdate.exe related errors
Important: Some malware also uses the file name GoogleUpdate.exe, for example TROJ_GEN.F4AC3IJ or TROJ_DLOAD.BF (detected by TrendMicro), and Trojan.Gen or W32.Sality.AE (detected by Symantec). Therefore, you should check the GoogleUpdate.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.
A clean and tidy computer is the key requirement for avoiding problems with GoogleUpdate. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic 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 resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off doing a repair of your installation, or in the case of Windows 8, executing the DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.
To help you analyze the GoogleUpdate.exe process on your computer, the following programs have proven to be helpful: Security 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. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.