Thanks for your help!!  I got it done, by downloading and reinstaling the software  
Hi, I just bought a Dell Inspiron 3520 from eBay. The computer was restored and reset to the factory settings. I was trying to upgrade to windows 8.1 through the windows store. Every time I try to upgrade, the download stops and a message appears saying that the app can not be installed because  of error KB 0x8007001f. Help please.
Can't upgrade from windows 8 to windows 8.1