upgrading from betaversio

[Guest]

I am currently using Version 5.1 (Build 2600.xpsp_sp2_rc1.040311-2315 :
Service Pack 2, v.20) this information is from winver command. I am having
trouble upgrading to the full version of sp2 as when I try to install the
full version I get the error ( This service pack cannot be installed on top
of the windows XP service pack 2 Build currently installed on this computer.
Cancel this installation process, uninstall your current Windows XP service
pack 2 build, then re install this service pack). I am using the install disk
sent to me from microsoft as the auto update site gives me the same error.
The only problem is I cant uninstall the previous service pack as I cant find
where it is. I've tried looking under add\remove programs with show updates
checked. Still to no avail. Any help here would be appreciated.
With Thanks

 

[Jon_Hildrum]

If you cannot find the service pack in add/remove program the reason may be
because the service pack was not installed as a service pack patch but
rather as an integrated service pack.

One option that may work is to use a repair install and effectively
reinstall winXP. Then install the service pack after reinstalling XP.