Does the 24x7 install update/replace the scrrun.dll?

Not directly. By default 24x7 setup installs Microsoft Windows Script Host (WSH)by running WSH setup program. The WSH setup should update the scrrun.dll if is older than the one included with the setup.

If you don't want to install WSH use /NOWSH command switch when running the 24x7 setup program.

: Does the 24x7 install update/replace the scrrun.dll?

It is interesting to note that after installing 24x7 that the SCRRUN.DLL objects had changed and caused VB applications to fail on compile. This has only happened on my machine after installing 24x7.

In particular, the Folder object has been replaced by a Folder_Class object. The version has also rolled to a higher one than is in the Visual Studio SP5 release.

Since only my machine was affect and only after installing 24x7, I can only conclude that this problem was caused by my installation of 24x7.

Another note, the Windows Script Host Object Model seems to have been uneffected.

: Not directly. By default 24x7 setup installs Microsoft Windows Script Host
: (WSH)by running WSH setup program. The WSH setup should update the
: scrrun.dll if is older than the one included with the setup.

: If you don't want to install WSH use /NOWSH command switch when running the
: 24x7 setup program.

24x7 runs Microsoft's Windows Script Host setup v5.5. I don't know if this can help you but just in case check
http://msdn.microsoft.com/library/default.asp?url=/nhp/default.asp?contentid=28001169 for additional information

: It is interesting to note that after installing 24x7 that the SCRRUN.DLL
: objects had changed and caused VB applications to fail on compile. This
: has only happened on my machine after installing 24x7.

: In particular, the Folder object has been replaced by a Folder_Class object.
: The version has also rolled to a higher one than is in the Visual Studio
: SP5 release.

: Since only my machine was affect and only after installing 24x7, I can only
: conclude that this problem was caused by my installation of 24x7.

: Another note, the Windows Script Host Object Model seems to have been
: uneffected.

I have a problem buying your response. MSFT does not publish ever having exposed the scrrun.dll with the version that is on my system after installing 24x7.
Please feel free to refer to the following MSFT site:
http://support.microsoft.com/default.aspx?scid=/servicedesks/fileversion/dllinfo.asp&fp=1

: 24x7 runs Microsoft's Windows Script Host setup v5.5. I don't know if this
: can help you but just in case check
:
: http://msdn.microsoft.com/library/default.asp?url=/nhp/default.asp?contentid=28001169
: for additional information

Not sure about that. 24x7 runs scr55en.exe (which is WSH 5.5 setup) as a "black-box"

On other hand, it is hard to believe that MS ships scrrun.dll with WSH 3.x, 4.x, 5.1 and then suddently skips it in 5.5 and then again ships it with 5.6. That does not sound logical. Also note that the next public version after 5.1 was 5.5 (skipping 5.2, 5.3 and 5.4 all together). 5.6 was initialy released for WinXP

: I have a problem buying your response. MSFT does not publish ever having
: exposed the scrrun.dll with the version that is on my system after
: installing 24x7.
: Please feel free to refer to the following MSFT site:
: http://support.microsoft.com/default.aspx?scid=/servicedesks/fileversion/dllinfo.asp&fp=1