Install Flash Failed Failure is ignored, Result=1

"2007/2/2:20:57:48 Brian BRIANHOME Install Flash Failed Failure is ignored, Result=1
2007/2/2:21:01:09 Brian BRIANHOME Install AutoCAD 2007 Failed Installation aborted, Result=3
2007/2/2:21:01:09 Brian BRIANHOME === Installation ended ==="

Ok one of our engineers computer bugged down due to "rat". So I replaced it with a a spare PC with pre installed XP, I installed Autocad 2007 but the error above came up!

I uninstalled then reinstalled Autocad 2007 but still can''t still fully install it.
I installed Flash manually but still cannot...

after searching in google! nothing came up!
http://www.google.com.ph/search?hl=en&client=firefox-a&rls=org.mozilla%3Aen-US%3Aofficial&hs=rXV&q=autocad+2007+install+flash+failed&btnG=Search&meta=

hmmm other prof of autocad suggest thing that do not work at all...

so what I did is just reinstall the Operating System! That's it