A theory which I can never test is that Spybot immunizing could interfere with the update. But damage by Spyware is already known to cause interference. Suggestions.
1. Use Spybot's Undo in it's immunize screen as well as unlock IE settings and homepage.
2. The other IE60 install method. Read the thread:
My OS is Win Me with IE 5.5 (no update) and OE6.
When updating IE to ver 6 SP1 via the Windows update site (critical update) I received the error " ..not all components were installed....". The list included Internet Explorer Browser... I tried resume download with the same result. I downloaded it at the Microsoft download site, also with the same result. Viruses and on line scans were negative, as well as Stinger, CWShredder, AdAware and Spybot S&D. Any ideas ? Thanks.