Windows operating system comes with so many features by dint of which you can complete your various technical works very easily. You can also update the applications or programs installed in the Windows or you can also upgrade the Windows itself sometimes for better performance. If you are upgrading your older Windows OS to the Windows 10 then you may get GWXUX.exe error in Windows. It is an application error that comes in the beginning of the upgrading process. It may happen due to many reasons like incorrect registry entries, installing windows using a damaged CD/DVD etc. You cannot be able to work on the computer properly after the occurring of this error issue. So, it is very important to fix Windows GWXUX.exe error with the help of the manual or automatic troubleshooting. You can download and install Advanced System Repair tool in the computer for automatic troubleshooting.