ok did some tests on different Ultimate distributions(u can install Win7 w/o cdkeys anyways)
*Win7-x86 non-SP1 gives the same error.
*Win7-x64 non-SP1 runs update fine.
*Win7-x86 SP1(rtm) runs update fine.
i have tried these on non-activated installations, and also on "P"-activated ones.
now the purpose i opened this topic is not to ask why or what causes the errors. but to ask those who use the same OS if they are having the same problems using Windows Update a few days ago, specifically since 2 days ago...
i could download SP1, but like what i have said above, i only need specific updates and i dont need all since RTM release.