New PC: Win 10, 64-bit, attaching AdventureWorks2012 to SQL Server 2012 - get an operating system error

TITLE: Microsoft SQL Server Management Studio
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Attach database failed for Server 'DESKTOP-M1CLFCE\TRAV11'.  (Microsoft.SqlServer.Smo)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=11.0.2218.0+((SQL11_RTM_GDR).120612-1251+)&EvtSrc=Microsoft.SqlServer.Management.Smo.ExceptionTemplates.FailedOperationExceptionText&EvtID=Attach+database+Server&LinkId=20476

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ADDITIONAL INFORMATION:

An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo)

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Unable to open the physical file "C:\sql2012\AdventureWorks2012_Database\AdventureWorks2012_Data.mdf". Operating system error 5: "5(Access is denied.)". (Microsoft SQL Server, Error: 5120)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft%20SQL%20Server&ProdVer=11.00.2218&EvtSrc=MSSQLServer&EvtID=5120&LinkId=20476

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BUTTONS:

OK
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