I've looked at the posts here and problems people have had and tried to resolve it through ensuring the authorisations to run as admin are set up but they don't work for me. My error lists is long:
Mon Oct 17 07:04:34 2016 NOTE: --user option is not implemented on Windows
Mon Oct 17 07:04:34 2016 NOTE: --group option is not implemented on Windows
Mon Oct 17 07:04:34 2016 OpenVPN 2.3.12 x86_64-w64-mingw32 [SSL (OpenSSL)] [LZO] [PKCS11] [IPv6] built on Oct 3 2016
Mon Oct 17 07:04:34 2016 Windows version 6.2 (Windows 8 or greater) 64bit
Mon Oct 17 07:04:34 2016 library versions: OpenSSL 1.0.1u 22 Sep 2016, LZO 2.09
Mon Oct 17 07:04:34 2016 Socket Buffers: R=[65536->65536] S=[65536->65536]
Mon Oct 17 07:04:34 2016 UDPv4 link local: [undef]
Mon Oct 17 07:04:34 2016 UDPv4 link remote: [AF_INET]myip:1194
Mon Oct 17 07:04:34 2016 TLS: Initial packet from [AF_INET]myip:1194, sid=frt5453f 43ef0a26
Mon Oct 17 07:04:34 2016 VERIFY OK: depth=1, stuff here
Mon Oct 17 07:04:34 2016 VERIFY OK: nsCertType=SERVER
Mon Oct 17 07:04:34 2016 VERIFY OK: stuff here
Mon Oct 17 07:04:34 2016 Data Channel Encrypt: Cipher 'BF-CBC' initialized with 128 bit key
Mon Oct 17 07:04:34 2016 WARNING: this cipher's block size is less than 128 bit (64 bit). Consider using a --cipher with a larger block size.
Mon Oct 17 07:04:34 2016 Data Channel Encrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Mon Oct 17 07:04:34 2016 Data Channel Decrypt: Cipher 'BF-CBC' initialized with 128 bit key
Mon Oct 17 07:04:34 2016 WARNING: this cipher's block size is less than 128 bit (64 bit). Consider using a --cipher with a larger block size.
Mon Oct 17 07:04:34 2016 Data Channel Decrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Mon Oct 17 07:04:34 2016 Control Channel: TLSv1, cipher TLSv1/SSLv3 DHE-RSA-AES256-SHA, 2048 bit RSA
Mon Oct 17 07:04:34 2016 [server] Peer Connection Initiated with [AF_INET]myip:1194
Mon Oct 17 07:04:37 2016 SENT CONTROL [server]: 'PUSH_REQUEST' (status=1)
Mon Oct 17 07:04:37 2016 PUSH: Received control message: 'PUSH_REPLY,redirect-gateway stuff here
Mon Oct 17 07:04:37 2016 OPTIONS IMPORT: timers and/or timeouts modified
Mon Oct 17 07:04:37 2016 OPTIONS IMPORT: --ifconfig/up options modified
Mon Oct 17 07:04:37 2016 OPTIONS IMPORT: route options modified
Mon Oct 17 07:04:37 2016 OPTIONS IMPORT: --ip-win32 and/or --dhcp-option options modified
Mon Oct 17 07:04:37 2016 ROUTE_GATEWAY 192.168.0.1/255.255.255.0 I=5 HWADDR=ad:dr:es etc
Mon Oct 17 07:04:37 2016 do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0
Mon Oct 17 07:04:37 2016 open_tun, tt->ipv6=0
Mon Oct 17 07:04:37 2016 TAP-WIN32 device [Ethernet 2] opened: \\.\Global\{id}.tap
Mon Oct 17 07:04:37 2016 TAP-Windows Driver Version 9.21
Mon Oct 17 07:04:37 2016 Notified TAP-Windows driver to set a DHCP IP/netmask of 10.8.0.6/255.255.255.252 on interface {id} [DHCP-serv: 10.8.0.5, lease-time: 31536000]
Mon Oct 17 07:04:37 2016 NOTE: FlushIpNetTable failed on interface [9] {id} (status=5) : Access is denied.
Mon Oct 17 07:04:42 2016 TEST ROUTES: 2/2 succeeded len=1 ret=1 a=0 u/d=up
Mon Oct 17 07:04:42 2016 C:\WINDOWS\system32\route.exe ADD myip MASK 255.255.255.255 192.168.0.1
Mon Oct 17 07:04:42 2016 ROUTE: route addition failed using CreateIpForwardEntry: Access is denied. [status=5 if_index=5]
Mon Oct 17 07:04:42 2016 Route addition via IPAPI failed [adaptive]
Mon Oct 17 07:04:42 2016 Route addition fallback to route.exe
Mon Oct 17 07:04:42 2016 env_block: add PATH=C:\WINDOWS\System32;C:\WINDOWS;C:\WINDOWS\System32\Wbem
Mon Oct 17 07:04:42 2016 ERROR: Windows route add command failed [adaptive]: returned error code 1
Mon Oct 17 07:04:42 2016 C:\WINDOWS\system32\route.exe ADD 0.0.0.0 MASK 128.0.0.0 10.8.0.5
Mon Oct 17 07:04:42 2016 ROUTE: route addition failed using CreateIpForwardEntry: Access is denied. [status=5 if_index=9]
Mon Oct 17 07:04:42 2016 Route addition via IPAPI failed [adaptive]
Mon Oct 17 07:04:42 2016 Route addition fallback to route.exe
Mon Oct 17 07:04:42 2016 env_block: add PATH=C:\WINDOWS\System32;C:\WINDOWS;C:\WINDOWS\System32\Wbem
Mon Oct 17 07:04:42 2016 ERROR: Windows route add command failed [adaptive]: returned error code 1
Mon Oct 17 07:04:42 2016 C:\WINDOWS\system32\route.exe ADD 128.0.0.0 MASK 128.0.0.0 10.8.0.5
Mon Oct 17 07:04:42 2016 ROUTE: route addition failed using CreateIpForwardEntry: Access is denied. [status=5 if_index=9]
Mon Oct 17 07:04:42 2016 Route addition via IPAPI failed [adaptive]
Mon Oct 17 07:04:42 2016 Route addition fallback to route.exe
Mon Oct 17 07:04:42 2016 env_block: add PATH=C:\WINDOWS\System32;C:\WINDOWS;C:\WINDOWS\System32\Wbem
Mon Oct 17 07:04:42 2016 ERROR: Windows route add command failed [adaptive]: returned error code 1
Mon Oct 17 07:04:42 2016 C:\WINDOWS\system32\route.exe ADD 10.8.0.1 MASK 255.255.255.255 10.8.0.5
Mon Oct 17 07:04:42 2016 ROUTE: route addition failed using CreateIpForwardEntry: Access is denied. [status=5 if_index=9]
Mon Oct 17 07:04:42 2016 Route addition via IPAPI failed [adaptive]
Mon Oct 17 07:04:42 2016 Route addition fallback to route.exe
Mon Oct 17 07:04:42 2016 env_block: add PATH=C:\WINDOWS\System32;C:\WINDOWS;C:\WINDOWS\System32\Wbem
Mon Oct 17 07:04:42 2016 ERROR: Windows route add command failed [adaptive]: returned error code 1
Mon Oct 17 07:04:42 2016 Initialization Sequence Completed
Any ideas on how to resolve this most gratefully received.