Attach sql server 2012 error, Unable to open the physical file

Question

I got message box

Unable to open the physical file "C:\Project Basdat\DAYCARE.mdf". Operating system error 5: "5(failed to retrieve text for this error. Reason: 15105)". (Microsoft SQL Server, Error: 5120)

when trying to attach database file that I made from another pc.

I use Windows 10.

Help :(

Answer 1

The link I posted previously is broken so I removed it. If you run SQL Server Management Studio as administrator it should work just fine.