Not long ago i did a fresh install of Win 7. The Windows Update screen said there were 148 important updates plus a handful or two of recommended updates which i ignored. Anyway, i allowed WU to proceed and install all 148 of them. After updating, the system bootup time was increased from 18 seconds to 42 seconds. Performance was not quick & snappy like it should be (Core i7 cpu / 12GB RAM / 240GB SSD). Running CCleaner improved things slightly (bootup reduced a few seconds), but the system still wasn't responsive as it should be. Allowed system to idle for a couple of hours to make sure TRIM had a chance to work after removing all the files left over from updates, etc. but it made no difference. The SSD had been secure-erased before the install began so i was left with the conclusin that allowing WU to install everything it considered "important" was not exactly desirable from a performance point of view ...