Windows Update Problem

I'm running XP Pro sp3 on an X40 ThinkPad. Of the last 9 critical updates, the 4 which were not for .net worked, as well as 2 of the .net updates for .net 3.5 and .net 4. But three, KB2742597 for .net 1.1 sp1, KB2742596 for .net 2.0 sp 2 and KB2756918

for .net 3.0 sp2, failed. I tried using automatic update, the windows update site and manual updates, all with the same result. I get no error message. Instead, the update begins and later stops without ending the install program. The installer can not

be stopped. If I try to cancel, it says it's cancelling but nothing happens. In this state, the only way to get out of windows is to use the power button. In case I was trying to quit too soon, I left one running all night, with the same result. What needs

to be done?

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