Topic: I have a problem of a missing program file ....

Hi guys , I am new on your Web-Site , and this is my first post.!
I am a student phylosofy, ...i dont know if my question belong here
I have a problem of a missing program file; from: C:Program FilesCommonFilesInstallShieldProfessionalRunTime9 1Intel32DotNetInstaller.exe cannot, find missing file: "mscoree.dll"
I think this file was deleted when a virus was found in it, could not be repaired, quarantined, and was deleted.
Is there a way to replace it ?...
Is it an important file for the function of the computer?...I am using the  Win2K   AMD  on this particular  IBM  So,
thanks a lot!