error en instalacion de W.U.

Hola, tengo w2000 con el sp4, he puesto este problema en el foro de
windows 2000 pero no han podido ayudarme, a ver si alguien tiene idea de
cual es el problema.
He intentado actualizar el sistema con las ultimas actualizaciones en
windows update, se me descargan todas pero cuando empieza a instalarlas
da error en todas y me notifica que no se ha podido realizar la
instalación por un problema en mi equipo, sin especificar más.
Porque pasa esto ??
y otra pregunta, las actualizaciones las tengo en la carpeta
softwaredistribution, las puedo instalar manualmende desde allí ??
Os pego las últimas líneas del windowsupdate.log
gracias




2005-10-13 19:42:36 836 e40 DnldMgr * All files for update were
already downloaded and are valid.
2005-10-13 19:42:36 836 e40 DtaStor Update service properties:
service registered with AU is {7971F918-A847-4430-9279-4A52D1EFE18D}
2005-10-13 19:42:36 3328 eb4 COMAPI >>-- RESUMED -- COMAPI:
Download [ClientId = MicrosoftUpdate]
2005-10-13 19:42:36 3328 eb4 COMAPI - Download call complete
(succeeded = 1, succeeded with errors = 0, failed = 0, unaccounted = 0)
2005-10-13 19:42:36 3328 eb4 COMAPI
2005-10-13 19:42:36 3328 eb4 COMAPI -- END -- COMAPI: Download
[ClientId = MicrosoftUpdate]
2005-10-13 19:42:36 3328 eb4 COMAPI -
2005-10-13 19:42:36 3328 c98 COMAPI -
2005-10-13 19:42:36 3328 c98 COMAPI -- START -- COMAPI: Install
[ClientId = MicrosoftUpdate]
2005-10-13 19:42:36 3328 c98 COMAPI
2005-10-13 19:42:36 3328 c98 COMAPI - Allow source prompts: Yes;
Forced: No; Force quiet: No
2005-10-13 19:42:36 3328 c98 COMAPI - Updates in request: 1
2005-10-13 19:42:36 3328 c98 COMAPI - ServiceID = {7971F918-A847-
4430-9279-4A52D1EFE18D}
2005-10-13 19:42:36 3328 c98 COMAPI - Updates to install = 1
2005-10-13 19:42:36 3328 c98 COMAPI <<-- SUBMITTED -- COMAPI:
Install [ClientId = MicrosoftUpdate]
2005-10-13 19:42:37 836 e8c Agent *************
2005-10-13 19:42:37 836 e8c Agent ** START ** Agent: Installing
updates [CallerId = MicrosoftUpdate]
2005-10-13 19:42:37 836 e8c Agent *********
2005-10-13 19:42:37 836 e8c Agent * Updates to install = 1
2005-10-13 19:42:37 836 e8c Agent * Title = <NULL>
2005-10-13 19:42:37 836 e8c Agent * UpdateId = {A3DC3BF3-3A7B-
4E74-BD7F-520A59F52FF6}.100
2005-10-13 19:42:37 836 e8c Agent * Bundles 1 updates:
2005-10-13 19:42:37 836 e8c Agent * {CD2FD7FC-93E6-4727-903F-
05D1C790AC7F}.100
2005-10-13 19:42:39 836 e8c Agent WARNING: Failed to evaluate
Installed rule, updateId = {ED300F67-421C-4C08-B3BA-F35C55F3B427}.100,
error = 0x80041017
2005-10-13 19:42:41 836 e8c Service WARNING:
GetUserTokenFromSessionId failed with hr 0x800706d3
2005-10-13 19:42:41 836 e8c Agent * WARNING: Exit code = 0x80240020
2005-10-13 19:42:41 836 e8c Agent *********
2005-10-13 19:42:41 836 e8c Agent ** END ** Agent: Installing
updates [CallerId = MicrosoftUpdate]
2005-10-13 19:42:41 836 e8c Agent *************
2005-10-13 19:42:41 836 e8c Agent WARNING: WU client failed installing
updates with error 0x80240020
2005-10-13 19:42:41 3328 e08 COMAPI >>-- RESUMED -- COMAPI:
Install [ClientId = MicrosoftUpdate]
2005-10-13 19:42:41 3328 e08 COMAPI - Install call failed
2005-10-13 19:42:41 3328 e08 COMAPI - Reboot required = No
2005-10-13 19:42:41 3328 e08 COMAPI - WARNING: Exit code =
0x80240FFF; Call error code = 0x80240020
2005-10-13 19:42:41 3328 e08 COMAPI
2005-10-13 19:42:41 3328 e08 COMAPI -- END -- COMAPI: Install
[ClientId = MicrosoftUpdate]
2005-10-13 19:42:41 3328 e08 COMAPI -
2005-10-13 19:42:41 836 e8c Report REPORT EVENT: {134BD87C-ADA2-
43CF-9EAD-D50EED37E24F} 2005-10-13 19:42:36+0200 1 162 101
{A3DC3BF3-3A7B-4E74-BD7F-520A59F52FF6} 100 0 MicrosoftUpdate
Success Content Download Download succeeded.
2005-10-13 19:42:41 3328 c98 COMAPI WARNING: Operation failed due
to earlier error, hr€240020
2005-10-13 19:45:07 3328 c98 COMAPI -- COMAPI:
IUpdateServiceManager::UnregisterServiceWithAU --
2005-10-13 19:45:07 3328 c98 COMAPI - ServiceId = {7971f918-a847-
4430-9279-4a52d1efe18d}
2005-10-13 19:45:10 836 f1c DtaStor Update service properties:
service registered with AU is {9482F4B4-E343-43B6-B170-9A65BC822C77}
2005-10-13 19:45:10 836 f1c DtaStor Update service properties:
service registered with AU is {9482F4B4-E343-43B6-B170-9A65BC822C77}
2005-10-13 19:45:10 836 f1c DtaStor WARNING: Update Service: Failed
to update backup store