Marie-Christine Nguyen (asker) Nov 9, 2015:

Parfait ! Merci à tous !

Erzsébet Czopyk Nov 8, 2015:

@Daryo bravo, you are real pro

Daryo Nov 8, 2015:

it's because you are not asking the right question

The DeWitt plant started operations in 1996 and in 2007 added an advanced magnetron sputter coater, allowing production of high performance Guardian ClimaGuard® and SunGuard® low-E glass products. The plant services window customers and commercial fabricators throughout the United States, targeting those operating in the upper Midwest. The plant also produces high-speed tempered glass and mirrors.

https://www.guardian.com/AboutGuardian/Newsroom/News/WEB_074...

Erzsébet Czopyk Nov 8, 2015:

:-) window customers = customer inquiries for windows

Whatever you search, all the time the first link: Contact Support - Windows Help
windows.microsoft.com/en-us/windows/contact-support