Hi!Jrp!
Click Start, and then click Run.
In the Open box, type cmd, and then click OK.
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
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
At the command prompt, type exit, and then press ENTER.
Restart your computer.
Update the Windows Installer files on your hard disk to the latest
version. Windows Installer 2.0 is available for download from the
Microsoft Download Center:
Shut down your computer, and then restart it in standard mode.
Re:-Microsoft Knowledge Base Article - 315346
http://support.microsoft.com/default.aspx?scid=kb;en-us;Q315346
regards/
ssg MS-MVP
pronetworks.org