Try lowering the User Access Control settings: This runs the Origin client as an administrator account, and should let the game install.
If your hard drive has FAT32 formatting, talk with your PC manufacturer for the best way to fix the issue. If you have another hard drive, check to see if it is formatted differently. It will give you the partition size, plus the format-for example (C:) XXGBNTFS or FAT32.
Sometimes downloads and installations get stopped or stuck, or your installed games won’t load.