Acrobat XI wont install to default location

Hi there

I am having difficulty installing Acrobat from the cloud to my laptop.

I have been able to install In Design, Photoshop etc with no problems, but Acrobat gets to 99% and fails. The error message is

Exit Code: 7

Please see specific errors below for troubleshooting. For example,  ERROR:

-------------------------------------- Summary --------------------------------------

- 0 fatal error(s), 3 error(s)

----------- Payload: Acrobat Professional 11.0.0.0 {23D3F585-AE29-4670-8E3E-64A0EFB29240} -----------

ERROR: Error 1327.Invalid Drive: P:\ mapped to a user folder. The drive does not exist or could not be connected. You can either disconnect the drive or reassign the drive letter. For details refer http://kb2.adobe.com/cps/404/kb404946.html

ERROR: Install MSI payload failed with error: 1603 - Fatal error during installation.

MSI Error message: Error 1327.Invalid Drive: P:\ mapped to a user folder. The drive does not exist or could not be connected. You can either disconnect the drive or reassign the drive letter. For details refer http://kb2.adobe.com/cps/404/kb404946.html

ERROR: Third party payload installer AcroPro.msi failed with exit code: 1603

---------------------------------------------------------------------- ---------------

I am trying to install to C:\Program Files\Adobe.

I have uninstalled reader.

I have run cleaner on acrobat and reader.

Any advice much appreciated

thanks very much