virtualbox 4.3.18 4.3.16 not running , no gui vms -- win10

VirtualBox COM Server 4.3.16 r95972 win.amd64 (Sep  9 2014 17:22:20) release log
00:00:00.009676 main     Log opened 2014-10-31T09:06:56.366788000Z
00:00:00.009676 main     Build Type: release
00:00:00.009676 main     OS Product: Unknown NT v6.4
00:00:00.009676 main     OS Release: 6.4.9860
00:00:00.009676 main     OS Service Pack:
00:00:00.042678 main     DMI Product Name: xxxx
00:00:00.066679 main     DMI Product Version: xxxx
00:00:00.066679 main     Host RAM: 3990MB total, 1993MB available
00:00:00.066679 main     Executable: C:\Program Files\Oracle\VirtualBox\VBoxSVC.exe
00:00:00.066679 main     Process ID: 5492
00:00:00.066679 main     Package type: WINDOWS_64BITS_GENERIC
00:00:00.458876          HostDnsMonitorProxy: Host's DNS information updated:
00:00:00.459219          DNS server 1: 192.168.1.1
00:00:00.557229          VDInit finished
00:00:00.571231          ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={fafa4e17-1ee2-4905-a10e-fe7c18bf5554} aComponent={VirtualBox} aText={Could not find a registered machine named 'test0'}, preserve=false
00:00:05.597195 Watcher  ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={fafa4e17-1ee2-4905-a10e-fe7c18bf5554} aComponent={VirtualBox} aText={The object is not ready}, preserve=false