Windows 8.1 upgrade on Virtual box

Wanted to update the Windows 8 VM I keep handy on my MacBook Air to Windows 8.1 but:

The more info being:

OK sounds easy - first tried turning on PAE and NX in the virtual box settings, rebooted and retried. But the same error occurs.

Quick google later and discovered it's connected to this Bug 11899 - CMPXCHG16B instruction is disabled by default. Enabled it for this VM:

vboxmanage setextradata "win8" VBoxInternal/CPUM/CMPXCHG16B 1

Also needed to enable 3D on the graphics card:

And then sucessfully installed the update:

Shredded Beef for Tacos

Shredded Beef for Tacos

Serves 8

Ingredients

• 1.2Kg pack flank steak (Costco) or 2-3lb of lean braising/stewing steak
• 2 medium onions, chopped
• 4-5 cloves garlic
• 2-3 red chilies
• 1-2 tsp dried oregano
• 2 tsp ground coriander
• 2 tsp smoked paprika
• good pinch ground white pepper
• good pinch salt
• 2 tbsp red wine vinegar
• 1 tbsp black treacle

Method

Sear the beef pieces, place in a pan with a good fitting lid or slow cooker with the other ingredients. give it all a good swish round to mix. 

Cook for around 6-8 hours until the beef easily falls apart. then with a fork shred the beef (the onions etc will be very soft by now too).

Serving

Serve with warmed crispy tacos, sour cream, sliced peppers salad and cheese & fresh coriander.

Supermarket mini salsa/guacamole/sour cream combo is hard to beat for value.

Storage

Once cooled this freezes very well.