I received the error (0x800f0826) when attempting to install SP1 both via Windows update today. It downloads fine and installs but fails and reverts back during the reboot. This is Windows 7 Home Premium x32 .I've run the System Update Readiness Tool with no effect. There are no hidden updates in Control Panel, the only Failed update is SP1.
Solution :
Let's try the following:
1. ClickStart type cmd (you should see the command prompt populate at the top) Right-click it and selectRun as Administrator
Inside the prompt type sfc /scannow
*Info on the System File Checker
2. Click:Reset Windows Update Componentsand run the FixIt? in both default and aggressive modes.
3. Download / Install / Run the System Update Readiness Tool
