Despite the temptation to save money or avoid the hassle of finding a valid license, installing RemoveWAT version 226 on Windows 8.1 carries severe risks:

If the store is irreparably damaged:

The most straightforward solution is to activate Windows 8.1 with a valid product key. Activation can usually be done through the PC Settings app under the "Update & recovery" section.

If you have already installed a RemoveWAT tool and are experiencing problems, do the following: