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What does the mscorsvw.exe file do?

The mscorsvw.exe process is also known as .NET Runtime Optimization Service (Version v2.0.50727_X86) or, as the case may be, Microsoft .NET Framework (Version 4 Client Profile) and is a part of Microsoft .NET Framework (Version 4 Client Profile, 4 Client, 4, 2.0 Service Pack). This software is produced by Microsoft (www.microsoft.com). An obsolete or defective version of mscorsvw.exe can cause problems for your computer that can range from slowness to error messages such as these:

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What you should know about mscorsvw.exe .NET Runtime Optimization service

mscorsvw.exe is not part of Windows, but it is important nonetheless. The file mscorsvw.exe is found in a subdirectory of C:\Windows. Frequently occurring are file sizes such as 69,632 bytes (34% of all these files), 130,384 bytes as well as 16 other variants.
The program executes in the background, and can only be terminated using Windows Task Manager. The producer of the file is registered with a certificate authority. This confirms the genuineness of the file. The mscorsvw file is not part of the Windows operating system. For this reason, 27% of all experts consider this file to be a possible threat. The probability that it can cause harm is high.

If you see this file on your hard drive or in Windows Task Manager, please make sure that it is not a malicious variant. It's a fact that many trojans try to cloak their true identity by calling themselves mscorsvw.exe. With the above information or by using tools like Security Task Manager you can determine if, in your case, the file is an undesirable variant.

What do other computer users say about mscorsvw?

Runs every 10 - 16 minutes for about 4 to 12 seconds. When it runs, it locks up Outlook, closes open screens, cancels scrolling, interferes with other processes. A real PEST! Zone Alarm seems to stop it if you "Kill" it in the program control screen. (run block)
Roger S. Orlando, Fla.
mscorsvw.exe is precompiling .NET assemblies in the background. Once it's done, it will go away. Typically, after you install the .NET Redist, it will be done with the high priority assemblies in 5 to 10 minutes and then will wait until your computer is idle to process the low priority assemblies. Once it does that it will shutdown and you won't see mscorsvw.exe... (further information...)
kerttu
hohe cpu auslastung
lucutus
it is used to run certain apps created by the framework.it doesnt seem hamless at all.
sean
When it is active it takes up a large amount of memory (I had it in excess of 100 MB)

Summary: 24 users judge mscorsvw.exe to be an essential file that should not be touched. 7 users consider it harmless. However, 5 users consider this to be a suspicious process and would like to get rid of it. For this reason, 3 users have already deleted mscorsvw.exe. source: file.net

How to uninstall Microsoft .NET Framework

mscorsvw.exe  .NET Runtime Optimization service fix

To remove .NET Runtime Optimization service from your computer, please follow the manual instructions below or use an automatic uninstaller product.

  1. Click the Windows Start Button. In Windows 8, look for Control Panel.
  2. Click Control Panel.
  3. Click Uninstall a program.
  4. Look for Microsoft .NET Framework in the list of available programs.
  5. Click Uninstall.

How to tell if mscorsvw.exe (.NET Runtime Optimization service) was uninstalled cleanly

After uninstalling, restart your computer. Then start Windows Explorer and see if there is still a folder with the name of the software under C:\Program Files. Be sure to check the Registry as well for remnants of .NET Runtime Optimization service. To do this, start "Regedit", then look under "HKEY_LOCAL_MACHINE" > "Software" for .NET Runtime Optimization service or the name of the producer. Always keep in mind that only a computer professional should ever directly delete entries in the Windows Registry.

What to do if a program does not uninstall

The easiest way to remove any kind of software cleanly and accurately is to use an uninstaller tool. Because the uninstaller automatically creates a backup, there is no risk of anything going wrong.

Last but not least

If Windows not working quite right for you, or if startup is taking a long time, or mscorsvw.exe is causing problems for you, a good Registry Cleaner may very well help. This is especially effective when it comes to older computers that have accumulated vast quantities of "garbage data" as the result of many software installs and uninstalls.

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