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 mscorsvw.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 .NET Runtime Optimization Service (version v2.0.50727_X86) or Microsoft .NET Framework (version 4 Client Profile) belongs to software Microsoft .NET Framework (version 4 Client Profile, 4 Client, 4, 2.0 Service Pack) or Microsoft .NET Framework NGEN by Microsoft (www.microsoft.com).
Description: Mscorsvw.exe is not essential for the Windows OS and causes relatively few problems. The mscorsvw.exe file is located in a subfolder of C:\Windows.
Known file sizes on Windows 10/8/7/XP are 69,632 bytes (26% of all occurrences), 66,240 bytes and 24 more variants.
The program is not visible. Mscorsvw.exe is digitally signed. The file is not a Windows core file. Therefore the technical security rating is 27% dangerous, however you should also read the user reviews.
Recommended: Identify mscorsvw.exe related errors
If mscorsvw.exe is located in a subfolder of the user's profile folder, the security rating is 50% dangerous. The file size is 13,179,660 bytes (66% of all occurrences) or 28,672 bytes. The program is not visible. Mscorsvw.exe is not a Windows system file. The software starts upon Windows startup (see Registry key: Run, MACHINE\Run).
If mscorsvw.exe is located in the Windows folder for temporary files, the security rating is 55% dangerous. The file size is 25,340 bytes (50% of all occurrences) or 1,796,027 bytes. The program has no file description. The process starts upon Windows startup (see Registry key: Run, MACHINE\Run). The mscorsvw.exe file is not a Windows core file. Mscorsvw.exe is able to record keyboard and mouse inputs, monitor applications and manipulate other programs.
Important: Some malware camouflages itself as mscorsvw.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder, for example AutoIt:Agent-OJ [Trj] or Win32:Malware-gen (detected by Avast), and Gen:Trojan.Heur.AutoIT.10 or Trojan.Generic.KDV.824738 (detected by BitDefender). Therefore, you should check the mscorsvw.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 mscorsvw. 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 repairing of your installation or, for Windows 8 and later versions, 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 mscorsvw.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.