If the system does not automatically prompt for upgrade Win8.1, how can you manually upgrade to Win8.1

If the system does not automatically prompt for upgrade Win8.1, how can I manually upgrade to Win8.1 via iOS image files?

Solution

When you are officially purchased the original or the hands already have Windows 8.1 ISO compact disc image files and 25-bit product keys. This document will take you step-by-step through a disc (mirroring) installation to upgrade to Windows 8.1. The CD-ROM image can be obtained from a Microsoft MSDN Subscription account or a TechNet subscription account or a Third-party Web site.

　　Note: due to the system's upgrade installation, may cause computer settings, data changes or loss, we recommend that you do a good job of personal data backup before the actual operation. Also, make sure that the computer has Windows8.1 driver support. After upgrading to 8.1, you may need to reinstall your common software and drivers.

The test hardware for this document is the Lenovo IdeaPad Y400 notebook, hardware configuration for Intel I5 3210M, 4G memory, 1TB hard drive, and the test ISO CD-ROM image file is downloaded for the Microsoft MSDN Subscription account. All of the following test screens and tests are measured for this hardware platform for reference only.

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