Hi, I will start from the very beginning. There is a huge issue with Windows Update for fresh installation this days. Microsoft did post update for Windows 7 SP1 - KB3102810 and for Windows 8.1 - KB3102812. I don't know is there update for Vista SP2 which is also affected. I personally experienced this issue on clean Vista and 7 installation both x64 architecture. Symptoms are after first Internet connection Windows Update Agent 7.6.7600.256 is downloaded then memory usage goes to about 900MB and CPU to 100% by svchost.exe making system unusable. Stopping wuauserv makes CPU usage drop instantly. Windows Update can't find any updates. There's no error code. Just searching and draining resources. Installing provided updates makes WU usable again but there is no update for Vista. Is there any solution?