When you install watir, you get all of these questions.
C:\Documents and Settings\Majid_Home>gem install watir
Install required dependency windows-pr? [Yn] Y
Install required dependency windows-api? [Yn] Y
Install required dependency win32-api? [Yn] Y
Select which gem to install for your platform (i386-mswin32)
1. win32-api 1.0.6 (x86-mswin32-60)
2. win32-api 1.0.6 (ruby)
3. win32-api 1.0.5 (x86-mswin32-60)
4. win32-api 1.0.5 (ruby)
5. Skip this gem
6. Cancel installation
The last one about the win32-api is particularly problematic. If you answer wrong you get a mess, yet the right answer is not obvious.
Opened a support request with win32 utils to see if we can get some advice on how to handle this.
http://rubyforge.org/tracker/index.php?func=detail&aid=20499&group_id=85&atid=412