I have a collection of error messages!

For your first error code, 0x8000ffff, it would seem to have something to do with your internet connection. As for the second one, 0x87DD0006, it should not be showing up anymore.

What you could try is first go through your settings and check to make sure you're account settings allow you to play multiplayer. If it is set to allow, go to Network settings and test your Multiplayer connection.

I am having the same problem. When I click on MS Solitaire Collection, I get a message that Xbox is unable to connect, cf. error 001000

Hi

What happens when this error code occurs? What are you doing when it occurs?

c'est quand J'ouvre microsoft solitaire collection que ce code d'erreur apparait

et il dise de me reférer ce code d'erreur 121010

et impossible de trouver la solution.Si je dit annuler le message je peux jouer quand même Microsoft solitaire collection mais quand je me reconnecte l le message réapparait toujours

[Translation-it's when I open microsoft solitaire collection that this error code appears

and he says to refer me to this error code 121010

and it's impossible to find the solution. If I say cancel the message I can still play Microsoft solitaire collection but when I reconnect there the message always reappears]

In a odd little twist, I unplugged my hard drive and the USB flash memory units I had plugged into the 360. Then I put the disc in. Surprise! No error message and I was able to play the games with no problem. I put the memory units back in, still no
problems. Once I plugged the hard drive back in, the error message returned. Unplugged the hard drive, left the memory units in, no error message, and was able to play as normal.

I have no idea why this occurs. Maybe there's something on the hard drive that isn't present on any of the memory units that's causing the error. I do know that when I first turned on my 360, it updated, and afterwards, I put the disc in and that's when
the trouble started.

Also, if you want the achievements, you will need to move your profile to a memory unit from the hard drive and then back again when you're done. That or you'll need to create a profile and keep it on the memory unit.

Hopefully this helps and hopefully there's a better answer to this, but this is all there is at the moment.

Hell Yeah, it works!!!

Thank you StuardATrueRed