Missing MSI files SQL Server 2008 R2 SP3

I have hit an issue while installing Service Pack 3 for SQL Server 2008 R2. The existing version is10.50.4295.0 (SP2+CU9)

 When running the SP3 file the following error occurs

SQL Server Setup has encountered the following error:

The cached MSI file 'C:\Windows\Installer\91a4f43.msi' is missing.
Its original file is 'sql_engine_core_inst.msi' and it was installed for product 'SQL Server 2008 R2 SP2 Database Engine Services' from '\\ServerName\Share$\SQL\SQL105\ENT\x64\setup\sql_engine_core_inst_msi\', version '10.52.4000.0', language 'ENU'.
To resolve this problem, recover the missing file from the installation media and start setup again.
For more information about how to resolve this problem, see 'Steps to restore the missing Windows Installer cache files' (http://go.microsoft.com/fwlink/?LinkId=144387) in the Microsoft Knowledge Base.

Error code 0x84B20002.

The next I tried to remove CU9 before applying SP3. The following error occurred when CU 9 was attempted to be removed.

The cached patch file 'C:Windows\Installer\483c7040.msp' is missing.