não consigo resolver
eu uso o Windows Millennium Edition

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My friend has the same problem and the following solution solve the problem
* A Windows Unicode file is missing from your computer.
To resolve the issue, please follow the below steps:
1. Remove MSN Messenger from your computer, and then reinstall MSN Messenger.
A. In the notification area at the far right of the task bar, right-click the MSN Messenger icon, and then click Exit.
B. Do one of the following depending on your operating system:
Microsoft Windows 98 and Microsoft Windows Millennium Edition
a. Click Start, click Settings, and then click Control Panel.
b. Double-click the Add/Remove Programs icon.
c. Click the Install/Uninstall tab in the Add/Remove Programs Properties dialog box.
d. Select MSN Messenger, and then click Add/Remove.
e. If prompted, click Yes to confirm that you want to remove the program, and then click OK.
Microsoft Windows 2000
a. Click Start, click Settings, and then click Control Panel.
b. Double-click the Add/Remove Programs icon.
c. Click Change or Remove programs, select MSN Messenger, and then click Remove or Change/Remove.
d. Select MSN Messenger, and then click Add/Remove.
e. If prompted, click Yes to confirm that you want to remove the program, and then click OK.
Microsoft Windows XP
a. Click Start, and then click Control Panel.
b. Click Add or Remove Programs, and then click Remove a program.
c. Click Change or Remove Programs.
d. From the Currently installed programs list, select MSN Messenger, and then click Remove or Change/Remove.
e. If prompted, click Yes to confirm that you want to remove the program, and then click OK.
C. Download the Microsoft Layer for Unicode. Visit http://www.microsoft...&DisplayLang=en Click the Download link.
D. Restart your computer.
E. Download and install MSN Messenger. Visit http://messenger.msn.com Click Download Now.
For additional online help, please visithttp://messenger.msn.com/help
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