"Error 1719: The Windows Installer service could not be accessed" error message when you try to add or remove a program
When I try to install .NET Framework 2.0 to Win2000 operation system the error is occured. So, as you know 98 or Win2000 operating system requires Windows Installer 3.0 before attempting to install .NET Framework 2.0.Cause : The Windows Installer files that are on your hard disk are damaged or are missing. Resolution : Reinstall the windows installer
To reinstall the Windows Installer, rename the damaged Windows Installer files, and then reinstall the Windows Installer. To do so:
1. Click Start, and then click Run.
2. In the Open box, type cmd, and then click OK.
3. At the command prompt, type the following line, and then press ENTER, where Drive is the drive where Windows is installed and where %Windir% is the folder where Windows is installed:
attrib -r -s -h drive:\%Windir%\system32\dllcache
For example, type
attrib -r -s -h c:\windows\system32\dllcache
Note If you are using Windows 98, type system instead of system32.
4. At the command prompt, type the following lines, pressing ENTER after each line:
ren msi.dll msi.old
ren msiexec.exe msiexec.old
ren msihnd.dll msihnd.old
5. At the command prompt, type exit, and then press ENTER.
6. Restart your computer.
and re-try to install .NET Framework
http://support.microsoft.com/?scid=kb%3Ben-us%3B315346&x=11&y=5
Related Terminology : Installing .NET Framework 2.0, Windows Installer 3.0
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