Same thing here. When I start VU it just says loading until the end of time.
Windows 7 64bit, AMD A10 cpu, 8GB ram, AMD HD6670 vga, all updated to latest driver.
My antivirus* did detect VU as a virus, but it was added as an exception, and reinstalled. VU is enabled on my firewall.
*I use Avira as an antivirus
I did try to run VU as Admin, and I'm out of ideas.
Oh, and in the FAQ section I found this, so:
Have you ran Battlefield 3 successfully via origin: YES
Do you have an Intel Integrated graphics card: NO
Operating System: [Windows 7]
Anti-Virus Solution: [Avira]
Have you linked your account for verification: NO
Have you tried above troubleshooting steps: YES
Does VU quit without a crash: NO
Crash Record: [N/A]
What were you doing when it crashed: [N/A] - it did not crash, it just does not load. Or well, loads infinitely.
If you find a solution, please tell us, I really want to try VU out ^^