Possible interpretations (none are official Microsoft or Limbo features):
Fix: Before booting, go to Limbo settings → Advanced → Uncheck "Use Hyper-V" (even if it’s greyed out). Then reduce RAM to 1536 MB. windows 7 ultimate limbo pc emulator upd
Even with the UPD, Windows 7 is heavy. Apply these tweaks inside the guest OS: Fix: Before booting, go to Limbo settings →
Additionally, in Limbo’s settings: