Could this be the one SIW is seeing, or are neither of these showing up in Task Manager?
I had specifically killed the service before running SIW, so neither are currently showing up in Task Manager (or ProcessExplorer). However, the error doesn't directly say "sandboxie", but rather says "A virtual machine (like SANDBOX) is running". I wonder if it could be referring to something else? I have no other VMs intentionally running or even installed at this time.
A virtual machine makes more sense. That will be Windows "Volume Shadow Service", Shadowservice.exe, which is used in the making of Backups or Disk Images of your system. It can make Backups of your system without everything having to be shut down.
Windows Backup uses it as do third party applications like Macrium Reflect.
Damn, you've got me then. Offhand I don't know of another service or process apart from the Apps we know about, that would be designated as a Virtual Machine.
Could it be running under a different name? I don't know, sorry, but I'll have a poke around, and in the meantime minds infinitely greater than mine may be watching this thread with envious eyes, and slowly but surely they're making plans to post an answer.
(Who said that, or something very similar? And I haven't touched a drop)
After poking around, I think your Virtual Machine could be another "Volume Shadow Copy" process used in backing up without shutting everything down.... "vssvc.exe".
I'd be a lot more comfortable if I knew what was causing the error. Is there another forum you are aware of where the authors answer questions? I can't be the only user experiencing this...