Win2000下打开程序或文件时弹出 windows installer,程序和文件无法打开

重安装Windows Installer方法：
1、双击注册installer_un.reg（installer_ur.reg的内容是：）

REGEDIT4

[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSIServer]

2、右键安装installer_un.inf（installer_un.inf的内容是：）

;unmsi.inf
;;;;;;;;;;;;;;;;;
[Version]
signature = "$Windows NT$"
Class = %ExceptionClassDesc%
ClassGUID = {F5776D81-AE53-4935-8E84-B0B283D8BCEF}
Provider = %Microsoft%
CatalogFile = msi.cat
ComponentId = {2E742517-5D48-4DBD-BF93-48FDCF36E634} ; GUID assigned to the Windows Installer
DriverVer=03-13-2001, 2.0.2460.1

[SourceDisksNames]
1 = %msi_media%

[SourceDisksFiles]
msi.dll = 1
msihnd.dll = 1
msimsg.dll = 1
msiexec.exe = 1
msisip.dll = 1

[DestinationDirs]
Msi.SystemFiles = 11 ; %windir%\system32
Msi.DllCacheFiles = 11,dllcache ; %windir%\system32\dllcache

[DefaultInstall]
DelFiles = Msi.SystemFiles,Msi.DllCacheFiles

;
; COPYFLG_REPLACE_BOOT_FILE flag (0x1000) not necessary for
; files in the dllcache
;

[Msi.DllCacheFiles]
msi.dll
msihnd.dll
msimsg.dll
msiexec.exe
msisip.dll

[Msi.SystemFiles]
msi.dll
msihnd.dll
msimsg.dll
msiexec.exe
msisip.dll

[Strings]
Microsoft = "Microsoft Corporation"
msi_media = "Microsoft Windows Installer Distribution Media"
ExceptionClassDesc = "Microsoft Windows Installer"

3、开始-运行：regsvr32 /u msi.dll

现在可以重新安装Windows Installer了，最新版地址：

9x/me:
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=CEBBACD8-C094-4255-B702-DE3BB768148F

nt/2k:
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=4B6140F9-2D36-4977-8FA1-6F8A0F5DCA8F#filelist

下载安装Windows Installer 清理实用工具
http://download.microsoft.com/download/e/9/d/e9d80355-7ab4-45b8-80e8-983a48d5e1bd/msicuu2.exe