New Application Installation Programs Will Not Run (242089)

SYMPTOMS

When you double-click any setup program, nothing may happen. Also, trying to use the Add/Remove Programs tool in Control Panel or running the setup program from a command prompt may have no effect.

CAUSE

This issue can occur for either of the following reasons:

Many setup programs are 16-bit. If any .dll files listed in the 'KnownDLLs' value at the following registry location are missing or damaged, Microsoft NT Virtual DOS Machine (NTVDM), which is required to run 16-bit applications, does not run properly:
```
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\WOW
					
```
The Config.nt file or the Autoexec.nt file is missing, damaged, or contains unexpected values.

RESOLUTION

To resolve this issue:

Verify that all of the files listed in the 'KnownDLLs' value at the following registry key are present in either the %SystemRoot%\System32 folder and/or the %SystemRoot%\System folder:
```
  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\WOW
					
```
To replace any files missing from the above list, copy them from a Windows NT 4.0-based computer that has a properly working NTVDM to the %SystemRoot%\System32 and %SystemRoot%\System folder.

NOTE: Not all of the .dll files in the list reside both in the System32 folder and the System folder, but many do. It does not harm your computer to have them duplicated in both locations.
If no files are missing, ensure that all the files are undamaged by replacing them with the same files from a Windows NT 4.0-based computer that has a properly working NTVDM.
Restart the computer.

MORE INFORMATION

The files listed in the 'KnownDLLs' value include:

Comm.drv
Commdlg.dll
Ctl3dv2.dll
Ddeml.dll
Keyboard.drv
Lanman.drv
Mapi.dll
Mmsystem.dll
Mouse.drv
Netapi.dll
Olecli.dll
Olesvr.dll
Pmspl.dll
Shell.dll
Sound.drv
System.drv
Toolhelp.dll
Vga.drv
Wfwnet.drv
Win87em.dll
Winoldap.mod
Winsock.dll
Winspool.exe
Wowdeb.exe
Timer.drv
Rasapi16.dll
Compobj.dll
Storage.dll
Ole2.dll
Ole2disp.dll
Ole2nls.dll
Typelib.dll
Msvideo.dll
Avifile.dll
Msacm.dll
Mciavi.drv
Mciseq.drv
Mciwave.drv
Progman.exe
Avicap.dll