windows installing message box

[amy]

I evidently deleted part of a windows program and now I
get these error boxes that read:

header: windows installer
text: preparing to install

however, nothing ever gets installed and this box appears
at the most inconvenient times.

can I download a program that can override my mistake?

I am a non-techy computer person.

thanks,

amy

 

[Dave Patrick]

These may help you.

How to Perform an In-Place Upgrade of Windows 2000
http://support.microsoft.com/support/kb/articles/Q292/1/75.ASP

What an In-Place Windows 2000 Upgrade Changes and What It Does Not Change
http://support.microsoft.com/default.aspx?scid=kb;en-us;Q306952