Failed to start virtual machine

[larky]

Backed up my 2 virtual machines (file, export appliance) and now I can't get them back. I tried to relese the HD and create a new machine with the old HD, with same error.
Removed the .Virtualbox.xml file, new machine, imported HD, same error.

Help?

End of log file

00:00:00.448 ******************** End of CPUID dump **********************
00:00:00.449 REM: VBoxREM32
00:00:00.459 TM: GIP - u32Mode=1 (SyncTSC) u32UpdateHz=64
00:00:00.490 TM: cTSCTicksPerSecond=0x8f51e380 (2 404 508 544) fTSCVirtualized=true fTSCUseRealTSC=false
00:00:00.490 TM: fMaybeUseOffsettedHostTSC=true TSCTiedToExecution=false TSCNotTiedToHalt=false
00:00:00.491 CoreCode: R3=03520000 R0=89d4c000 RC=a026e000 Phys=0000000009d4c000 cb=0x2000
00:00:00.493 ERROR [COM]: aRC=E_FAIL (0x80004005) aIID={0a51994b-cbc6-4686-94eb-d4e4023280e2} aComponent={Console} aText={<NULL>} aWarning=false, preserve=false
00:00:00.500 Power up failed (vrc=VERR_FILE_NOT_FOUND, rc=E_FAIL (0X80004005))

[Sasquatch]

Well, the log says that it's missing a file. Repair the installation of VB, maybe it's missing a system file or something and is the installation broken.