WMI Not found

Hi All,

I have Windows 2003 Ent Server SP2, yesterday my server was shut down abnormally due to Power shutdown, after that i found my system state backup was not happen so i tried force backup but backup not succeeded, so i checked event log and found VSS Event  12289 " Volume Shadow Copy Service error: Unexpected error  OpenService (shSCManager, 'VSS', SERVICE_QUERY_STATUS).  hr = 0x80070005." and WinMgmt Event ID 28 "WinMgmt could not initialize the core parts.  This could be due to a badly installed version of WinMgmt, WinMgmt repository upgrade failure, insufficient disk space or insufficient memory.
" i checked all possibility like disk size , memory,services but still problem is persists , after that i check VSS service dependency it shows " WMI not installed" pl help how to recover WMI as i don't have backup