Install failed - new version with error 1603

When I try install msn new version.

- This message show me: "The folder path 'Documents and
Settings' contains an invalid character."
- And I click on OK button
- And MSN Messenger 6.1 Setup show me, a windows with
information: "This instalation was interrupted. Please try
running this instalation again. Click the Finish button to
close this wizard."
- And MSN setup, show me one message with error: "MSN
Messenger setup has failed with error code:'1603'.Please
go to the MSN Messenger Web Site and download the software
from there."

Please help me! Else, I will have re-install my windows xp.

Thank you
Vitor Hugo