The limit is one. Dell does not issue new keys never has never will. Fake pirated COA stickers are common. Win8 and Win10 keys cannot be read from bios and then used on another machine. [URL] The OEM Activation system enables original equipment manufacturers (OEMs) to develop an internal inventory management system to manage the ordering and receiving of Windows product keys and the creation and reporting process for the Computer Build Report through Microsoft-hosted web services or Microsoft Digital Operations Services (MDOS). DELL does not hand out new keys.  You will have to buy a new copy of windows from microsoft or a vendor like newegg. I do not recommend ebay because pirates sell fake keys and media.. [URL]    
Hello, my problem is that I cannot activate my Windows, I called Microsoft and they told me that the key have exceeded activation limit and i should contact Dell to replace it, what number exactly should I call?
Windows key exceeded activation limit