14/01/2009
Erro ao instalar SP3 no WXP

1. Log on as Administrator in SAFE MODE.
2. Open Windows Explorer and wander over to:

c:\Documents and Settings\All Users\Documents

3. Right Click on the Documents folder; select the Security tab and note
users or groups authorized to access the folder = none.

XP Home does not grant access automatically so SP3 cannot copy to this folder.

4. Add Administrator group (and any others you want) to have access.
5. Grant Full Control to the Administrator group and/or any others.
6. Click OK until all these are closed. SP3 should then continue without a
complaint.

Fonte: http://www.tech-archive.net/Archive/WinXP/microsoft.public.windowsxp.general/2008-06/msg02374.html