当MSN 提示错误代码为80048820，这种问题一般是由于你的系统时间不对，先校准系统时间，如果仍然无法登录，也许是由于DLL文件注册信息丢失，保存下列代码到批处理文件[扩展名.bat]中，并运行这个批处理文件一下，一般可以解决.
如果新帐户可以登陆，可以试着把老账户里的“X:/Documents and Settings/你的账户名/Application Data下的所有文件夹和文件都删除”[X--指你的系统盘符]，问题解决。
REM www.msn-problems.com/downloads/r…
@ECHO OFF
ECHO.
ECHO *****************************************************************
ECHO * This file is provided by msn - problems.com *
ECHO * Copyright (C) 2004 - 2005 *
ECHO *****************************************************************
ECHO.
ECHO Please wait a few minutes while registering DLL files needed by MSN Messenger..
REM Following files only needed in windows XP
IF NOT " %os% " == " Windows_NT " GOTO WIN9X
regsvr32 Dssenh.dll / s
regsvr32 Gpkcsp.dll / s
regsvr32 Slbcsp.dll / s
regsvr32 Sccbase.dll / s
:WIN9X
IF NOT " %os% " == " Windows_NT " CD %windir% System
REM Needed by both XP and 9X
regsvr32 Softpub.dll / s
regsvr32 Wintrust.dll / s
regsvr32 Initpki.dll / s
regsvr32 Rsaenh.dll / s
regsvr32 Mssip32.dll / s
regsvr32 Cryptdlg.dll / s
regsvr32 Msxml3.dll / s
ECHO.
ECHO DLL files registered, Messenger should now function again!
ECHO You can ask for help on the forum at www.msn - problems.com
ECHO if Messenger still doesn ' t connect.
ECHO.
pause
exit
