Fix 0×8024200d Vista While Installing Service Pack 1
Here is a simple fix for popular 0×8024200D error in vista.
1. Uninstall the KB954366, KB957388 from Control panel > Programs > Programs and features > Installed updates. (put the KB number in search and click on Uninstall)

2. Download and install KB947562 from http://support.microsoft.com/kb/947562/.
3. Uninstall the antivirus software from the computer. (if any)
4. Restart the computer.
5. Install windows Vista service pack 1 from windows updates.
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