Error 800f0902 with 4 security patches

My system is Windows 7 pro 32-bit with SP1. Recently I installed it as an in-place upgrade from a fully patched Vista. On Win7, I received a bunch of Windows updates. About 135 installed successfully (25 of them first failed with error 800f0902, but then were available a second time and succeeded, too). However, 4 security patches once failed and became no more available since then:...