Windows update error help please

hi,
I am trying to install the new windows update on windows xp and it goes
throught the process and starts to 'inspect my my current configuration' -
but then half way through after the backup process and creating a restore
point it stops and gives me a popup saying - Service Pack 2 Setup Error--
Unable to read from or write to the database. Then it prompts me again
saying-- Service pack 2 installation did not complete.
I am logged on as the administrator and have nothing else but internet
explorer running.
Can anyone help me resolve this issue?
thanks, djnfinity

try
0x800710D9

Unable to read from or write to the database


You cannot install some updates or programs
http://support.microsoft.com/default.aspx?scid=822798

Cryptographic service and related errors
http://www.michna.com/kb/WxSP2.htm#C...Service_Pack_2
Look for fixdb.bat under "Error 0x800710D9