Im battling to install Lync Server in a test environment and are at the "Install Local Configuration Store" step. The prerequisites seems alright but bombs when installing the OcsCore.msi

...
Checking prerequisite SqlNativeClient...prerequisite satisfied.
Checking prerequisite SqlBackcompat...prerequisite satisfied.
Checking prerequisite UcmaRedist...prerequisite satisfied.
Installing OcsCore.msi(Feature_LocalMgmtStore)...failure code 1603
Error returned while installing OcsCore.msi(Feature_LocalMgmtStore), code 1603. Please consult log at C:\Users\Administrator.HAWC\AppData\Local\Temp\1\Add-OcsCore.msi-Feature_LocalMgmtStore-[2012_07_08][12_00_27].log

The logfile doesn't really help me either, this is the end of it

Property(S): Privileged = 1
Property(S): USERNAME = Windows User
Property(S): DATABASE = C:\Windows\Installer\9525f.msi
Property(S): OriginalDatabase = C:\ProgramData\Microsoft\Lync Server\Deployment\cache\4.0.7577.0\setup\OcsCore.msi
Property(S): UILevel = 2
Property(S): Preselected = 1
Property(S): ACTION = INSTALL
Property(S): WIX_ACCOUNT_LOCALSYSTEM = NT AUTHORITY\SYSTEM
Property(S): WIX_ACCOUNT_LOCALSERVICE = NT AUTHORITY\LOCAL SERVICE
Property(S): WIX_ACCOUNT_NETWORKSERVICE = NT AUTHORITY\NETWORK SERVICE
Property(S): WIX_ACCOUNT_ADMINISTRATORS = BUILTIN\Administrators
Property(S): WIX_ACCOUNT_USERS = BUILTIN\Users
Property(S): WIX_ACCOUNT_GUESTS = BUILTIN\Guests
Property(S): ROOTDRIVE = C:\
Property(S): CostingComplete = 1
Property(S): OutOfDiskSpace = 0
Property(S): OutOfNoRbDiskSpace = 0
Property(S): PrimaryVolumeSpaceAvailable = 0
Property(S): PrimaryVolumeSpaceRequired = 0
Property(S): PrimaryVolumeSpaceRemaining = 0
Property(S): INSTALLLEVEL = 1
Property(S): SOURCEDIR = C:\ProgramData\Microsoft\Lync Server\Deployment\cache\4.0.7577.0\setup\
Property(S): SourcedirProduct = {9521B708-9D80-46A3-9E58-A74ACF4E343E}
=== Logging stopped: 2012-07-08  12:01:46 ===
MSI (s) (98:F8) [12:01:46:354]: Note: 1: 1729 
MSI (s) (98:F8) [12:01:46:354]: Product: Microsoft Lync Server 2010, Core Components -- Configuration failed.

MSI (s) (98:F8) [12:01:46:354]: Windows Installer reconfigured the product. Product Name: Microsoft Lync Server 2010, Core Components. 
Product Version: 4.0.7577.0. Product Language: 1033. Manufacturer: Microsoft Corporation. Reconfiguration success or error status: 1603.

MSI (s) (98:F8) [12:01:46:356]: Deferring clean up of packages/files, if any exist
MSI (s) (98:F8) [12:01:46:356]: MainEngineThread is returning 1603
MSI (s) (98:84) [12:01:46:362]: RESTART MANAGER: Session closed.
MSI (s) (98:84) [12:01:46:362]: No System Restore sequence number for this installation.
MSI (s) (98:84) [12:01:46:363]: User policy value 'DisableRollback' is 0
MSI (s) (98:84) [12:01:46:363]: Machine policy value 'DisableRollback' is 0
MSI (s) (98:84) [12:01:46:363]: Incrementing counter to disable shutdown. Counter after increment: 0
MSI (s) (98:84) [12:01:46:364]: Note: 1: 1402 2: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Installer\Rollback\Scripts 3: 2 
MSI (s) (98:84) [12:01:46:364]: Note: 1: 1402 2: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Installer\Rollback\Scripts 3: 2 
MSI (s) (98:84) [12:01:46:364]: Decrementing counter to disable shutdown. If counter >= 0, shutdown will be denied.  Counter after decrement: -1
MSI (s) (98:84) [12:01:46:364]: Restoring environment variables
MSI (s) (98:84) [12:01:46:373]: Destroying RemoteAPI object.
MSI (s) (98:D4) [12:01:46:373]: Custom Action Manager thread ending.
MSI (c) (20:64) [12:01:46:379]: Decrementing counter to disable shutdown. If counter >= 0, shutdown will be denied.  Counter after decrement: -1
MSI (c) (20:64) [12:01:46:380]: MainEngineThread is returning 1603
=== Verbose logging stopped: 2012-07-08  12:01:46 ===

Any advice where to start in this? Thanks