Origin Error - A version of Origin has been found on this computer.

http://help.ea.com/en/article/manually-uninstalling-origin/

PLEASE DO THIS:

Remove the Origin program files:

1. From the Start menu, select Computer.
2. Select the hard drive; by default, Origin is installed on the C: drive.
3. Select the Program Files folder; on 64bit systems, this will be called Program Files (x86).
4. Right-click the Origin folder and select Delete.

Backup the Windows registry:

1. Hold down the Windows key and press R.
2. At the Run command, type regedit and select OK.
3. Select File, then Export.
4. Under Export Range, select All.
5. Choose a location and name for the backup file, then select Save.

Remove the Origin registry keys:

1. Expand the HKEY_LOCAL_MACHINE folder.
2. Expand the SOFTWARE folder.
   On 64bit systems, expand the Wow6432node folder.
3. Right-click the Origin folder and select Delete.
4. Expand the Microsoft folder.
5. Expand the Windows folder.
6. Expand the CurrentVersion folder.
7. Expand the Uninstall folder.
8. Right-click the Origin folder and select Delete.

Remove the Origin program cache:

1. From the Start menu, select Computer.
2. Select the C: drive.
3. Select the ProgramData folder.  If this folder does not appear, press Alt, select Tools, thenFolder Options.  Select the View tab, then check Show hidden files, folders, and drives.
4. Right-click the Origin folder and select Delete.