simpler solution to "wisptis.exe" annoyance
just found a simpler solution to this M$ annoyance; this is what I did:
1) disabled (many, many, many time ago) the prefetch mechanism;
2) renamed "wisptis.exe" in something different;
3) created a zero byte length "wisptis.exe" (you can, for instance, create an empty text document and rename it)
Now when I run Acrobat Reader, I have no more "wisptis.exe" in memory and the Office 2003 installation program don't start to reinstall it!