CORE-17819 This allows Microsoft VirtualPC 2004/2007 to boot LiveCD SAFEMODE to desktop,
the regular mode booted also without that addition already.
Fix picked from 0.4.15-dev-1537-g b1c460d34e
This commit was part of a much bigger PR3396, which I don't pick entirely today.
For CORE-17819 only this part is actually needed.