When you try to install for Windows 7 Service Pack 1 (SP1) , errors occur that prevent the installation. Use the following methods to find a solution for these installation errors.
You can use System Restore to fix Error C0000034 or other issues that may prevent Windows 7 SP1 from installing. This tool uses restore points to return the operating system to an earlier point in time, before the problem started.
Note Running system restore removes any programs and updates that you installed after the restore point date.
To restore the operating system to an earlier point in time, follow these steps:
Click Start, type system restore in the search box, and then click System Restore in the Programs list.
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In the System Restore window, click Next.
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Select the Show more restore points check box, select the most recent restore point that was created before the problem started, and then click Next.
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Click Finish.
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The computer then restarts and System Restore returns your computer to the state that it was in before the restore point that you chose.
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Note If you are asked for an administrator password or confirmation, type the password or provide confirmation.
The System Update Readiness Tool can help fix problems that might prevent Windows updates and service packs from installing. For example, an update might not install if a damaged system file prevents the update from recognizing the version of Windows that's running on your computer. If your computer is having problems installing an update or a service pack, download and install the tool, which runs automatically. Then, try installing the update or service pack again.
article, and then follow the instructions to download and install the Microsoft System Update Readiness Tool for your version of Windows.
After the installation completes, click Start, type cmd in the search box, and then click cmd in the Programs list.
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At the command prompt, type sfc/scannow, press ENTER, and then wait for the process to finish.
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Restart the System Update Readiness Tool to make sure that there are no more error logs. To do this, type sfc/scannow, press ENTER, and then wait for the process to finish.
Error 0x800F0A12 can occur if Windows 7 is not on an active partition. The Windows 7 SP1 installation program performs a test to verify that Windows 7 can start itself from the active partition. To resolve this error, follow these steps:
Click Start, and then click Control Panel.
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Click System and Security.
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Click Administrative Tools.
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Click Computer Management.
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In the navigation pane, under Storage, click Disk Management.
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Right-click the disk partition where Windows 7 is installed, and then click Mark Partition as Active.
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