Has anyone managed to install VirtualBox on Windows 7 64-bit ? While VirtualBox installs on Windows 7 32-bit, the installer eventually fails under Windows 7 64-bit - are there any tricks I need to be aware of?

I'm already running the installer as Administrator.

The installer stops at this point for about 3-4 minutes:

alt text

And eventually fails with:

alt text

  • Where in the installation does it fail? After or before the networking/USB driver installation? Sep 13, 2009 at 14:43
  • If you have a similar issue and this doesn't answer you, please ask a new question about it.
    – Gnoupi
    Aug 12, 2010 at 13:03

2 Answers 2


The latest version of Virtualbox, 3.0.6, is said to work on 64bit.
Generally, error 1603 involves account permissions on the target system, free disk space on the target system, or bad file download or locked/inaccessable file.

So question: While running the installer, did you do "Run as administrator"?

Note: Check the BIOS to ensure that your CPU supports VT-x and that it is enabled.

  • 1
    For VirtualBox you don't require VT-x even to run the 64-Bit hosts. It is only required for 64-Bit guests. However it is a permissions issue, since I have run VirtualBox since before v3 on 64-Bit 7. It may also be a corrupt installation file. Sep 13, 2009 at 15:27
  • Agreed, VT-x is not mandatory. It's only that I've seen comments recommending it whatever is the host/guest.
    – harrymc
    Sep 13, 2009 at 15:59
  • it installs after I enabled vt-x
    – nos
    Sep 13, 2009 at 16:43
  • Interesting. I have a machine without VTX and have been running it fine. Might need to open a ticket with Sun for them to investigate. Sep 13, 2009 at 18:31
  • I'm having exactly the same problem, but the second image doesn't shows, only the first one. I have a HP Pavillion dv9830us notebook, and I don't have a VT-x option in my BIOS. Is it locked? Are there other alternatives besides activating VT-x? I tried a lot of Virtualbox installers, even the last one (3.2.4) Jun 10, 2010 at 16:10

I received weird error messages (like Files corrupted) also while installing Windows in VirtualBox.

If things are going really weird, lack of disk space is often the problem like harrymc already mentioned and in my case, that was exactly the problem.

I've moved my images onto another partition that had plenty of space and Windows just installed fine.

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