i downloaded an iso image of win7 ultimate sp1 OEM. it was updated up to September 20-2013 by slipstream method i guess. i successfully registered and validated it by oem serial and windows loader 2.2.1. after registration and validation i updated it by windows automatic mode. I found in update history several updates did not installed, some showed did not installed but those were nicely installed i.e. internet explorer 11. some showed "cancelled". i downloaded tool from Microsoft named kb Windows6.1-KB947821-v31-x86.but it does not appear in installed updates besides updates history shows tool installed successfully. more than 125 updates failed. please help. please tell me if this problem is due to the use of slip-streamed copy of windows.