Jika anda sedang mengalami masalah saat install aplikasi yaitu ada pesan error " Failed to connect to SQL Database " ini adalah maslah pada Database Engine, maka berikut solusi tepat untuk anda ( karena saya juga pernah mengalaminya ) :
click Start, click Administrative Tools, click Services, and scroll to SQL Server (MSSQLSERVER). If it is not started, right-click the service, select Properties, in Startup Type select Automatic, click Apply, click Start, and then click OK.
PROBLEM SOLVED
click Start, click Administrative Tools, click Services, and scroll to SQL Server (MSSQLSERVER). If it is not started, right-click the service, select Properties, in Startup Type select Automatic, click Apply, click Start, and then click OK.
PROBLEM SOLVED

