erro 80070005 no update do vista

boas!tenho o seguinte problema no meu vistahome premium service pack 1,ja nao faz updades ha mais de 2 meses.aparece ''o windows nao consegue procurar actualizaçoes''ja tentei apagar os ultimos updates mas ele volta ao mesmo e erro 80070005,a ultima actualizaçao foi do microsoft.net framework 3.5.ja procurei em todo o lado e aparecem soluçoes komo mexer nos registos.mas plas rspostas nao me parece ser mt aconcelhado.plo site da microsoft tb nao me deixa fazer o update diz k n tenho privilegios de administrador apesar de os ter.ja nao sei k voltas dar a isto!alguem me pode ajudar?:shy_4_02:

RESOLUTION
To resolve this issue, follow these steps on client computers.
Step 1: Verify DCOM security
1. Click Start, click Run, type Dcomcnfg, and then click OK.
2. Expand Component Services, and then expand Computers.
3. Right-click My Computer, and then click Properties.
4. Click the COM Security tab.
5. Under Access Permissions, click Edit Default.
6. Verify that the following accounts are listed:
7. If any one of these accounts is missing in the Access Permission box, follow these steps:
a. Click Add, click Advanced, and then click Locations.
b. In the Locations box, click the Local_Computer_Name, and then click OK.
c. Click Find Now.
d. Press CTRL, click the required account names, and then click OK two times.
e. In the Group or User names box, click an account that you added, click Local Access in the Permissions for Account_Name box, and then click to select the check box in the Allow column.
f. Repeat step 7e for all the accounts that you just added, and then click OK.



Step 2: Verify DCOM default properties
1. Click the Default Properties tab.
2. Verify that the following configuration:
• The Enable Distributed COM on this computer check box is selected.
• In the Default Authentication level box, Connect is selected.
• In the Default Impersonation level box, Identify is selected.

3. Make any required changes, and then click OK.
4. Restart the computer.



Step 4: Verify the security descriptor in the Automatic Updates service

1. Download the Subinacl utility. To do this, visit the following Microsoft Web site:
http://www.microsoft.com/downloads/...4a91-93cf-ed6985e3927b&DisplayLang=en

2. Double-click the downloaded file, and then follow instructions in the Windows Resource Kit Tools Setup Wizard. By default, the Subinacl utility is installed in the following directory:
C:\Program Files\Windows Resource Kits\Tools
3. Click Start, click Run, type cmd, and then click OK.
4. At the command prompt, type cd C:\Program Files\Windows Resource Kits\Tools to move to the directory where the Subinacl utility was installed.
5. Type the following command, and then press ENTER:
Subinacl /service wuauserv /sddl=DSadA;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU)
Note In a domain environment, this security setting may be configured by a Group Policy object. If the issue is only temporarily resolved after you type this command, a Group Policy object is probably configured. The domain administrator must modify Group Policy to include the correct security settings.
Step 5: Verify the local security policy

7. Restart the computer.


Step 6: Enable user data persistence in Microsoft Internet Explorer
1. Open Internet Explorer.
2. On the Tools menu, click Internet Options.
3. Click the Security tab, and then click Internet.
4. Click Custom Level.
5. In the Settings dialog box, scroll to the Miscellaneous section.
6. Under Userdata persistence, click Enable.
7. Click OK two times.

iso ta um pouco confuso.eufaço tudo ate ao step 4 ponto 5.mas kuando escrevo isso diz k subinacl nao é reconhecido como comando interno ou externo,programa operacional ou ficheiro batch.