Hallo, when booting up Windows7 exactly after 5 minutes (not idling) the system starts to scan the HDDs for 1-2mins every time. It shows up clearly in Ressourcemonitor and XPerf but its not visible in Process Explorer so i cannot determine the exact source. I don't know what it is but its very reliably present after every systemboot . Maybe its something new from SP1. If i kill the corresponding service host (svchost.exe) Aero turns off as well. I didn't find anything in the scheduler (for the last 10min). Anyone else noticed this as well? Any ideas how to analyze it any further? Windows7 32Bit SP1 (RTM 7601.17514.101119-1850)

'Windows Search" service is disabled already. I tried to record the behavior with a screen recorder but once user harddisk throughput is sensed the service waits until resources are free again. Can anyone on SP1 try to reproduce that on his system? Boot up, start Ressourcemonitor (jn taskmanager) and wait 5min.

Those files in 'C:\Windows\Prefetch\ReadyBoot' are touched immediately (not after 5min). Checked the system with 'Avira AntiVir' BootCD (Isolinux). Didn't find anything. I searched for touched files (in \windows and all subfolders) that fall in that time range 22:30-22:32 (pic below). These files may be derived from windows update. Disabled the service but didn't change anything. I'm not sure what those 'wild numbered' files are though. They hold scrambled/compressed data.

Looks like its the 'Superfetch' service. I disabled it and a first test shows no access at all after 5min. I will keep an eye on it. Thanks for helping.

Just for some bootups to confirm its responsible for the heavy disk access... ;)