I've got a strange problem with Outlook Express: when I try to drag & drop
e-mails from it to an external folder, the copy seems to work (the symbol +
appears), but as I release left button there isn't a copy of the e-mail I've
dragged.
This trouble appeared suddenly; it happens only with Outlook Express.
I tried a System Restore but it didn't work (it's impossible to terminate
the whole process after rebooting).
I followed the procedure of Microsoft Knowledge Base (article no. 318378)
but I can't reinstall Internet Explorer (the message "Setup has detected a
newer version of Internet Explorer already installed on this system. Setup
cannot continue." still appears).
What can I do to get rid of this problem?

Thanks to all (sorry for bad English).
--
WinXP Pro SP2-AMD Athlon64 3500+-Kingston DDRAM 2048MB-W.D. 320GB SATA
HD-NEC DVD_RW ND-3550A-NEC DVD_RW ND-1300A-RADEON X700 Series Sec.ry
256MB-FlyTV Prime 30-Realtek AC97