Pre-installed Win8.1 system suddenly prompts the key failure solution

One user reported in the Microsoft community that the computer he bought abroad pre-installed the Win8.1 system, the system was activated when bought back, However, after a period of use, the key is suddenly indicated to be invalid, and some functions of the system are locked. What caused this phenomenon? How to solve this problem?

Solutions are as follows:

1, it is possible Win8.1 system crashes, causing the system does not recognize the key, this time you can reinstall Win8.1 system.

2, contact the brand manufacturer to find their own OEM model, and then get the OEM system for installation.

3, there may be a problem with the key, call Microsoft's customer service to check some information, let them help you solve, this situation generally appears less.

The above is a pre-installed Win8.1 system suddenly prompts the key failure solution, of course, you can also use the activation tool to activate Win8.1, which can also unlock the function on Win8.1.