Windows 7 - Mouse Pointers Disappear in Media Center

I have Win 7 Ultimate x64 with two monitors. One monitor for working, and the other monitor for media center. I had a problem with the mouse pointers getting locked into media center and had to use the "Windows Logo" key to unlock the mouse pointer to get back to the main monitor. Since last Update Tuesday, the mouse is not only locked into the media center, but it disappears as well. Any click of the mouse in media center causes the mouse pointer to disappear. I have to precede every mouse action by first pressing the "Windows Logo".
I have Microsoft Wireless Mouse 5000. I had Microsoft Intelligent Point installed, but uninstalled it as a test. It made no difference at all. I've tried different themes of pointers, which also made no difference.
Does anyone have a better idea or fix to this problem?

I just opened my Media Center for the first time and discovered this happened to me, too. I swung it over to my 2nd screen, & my mouse was corralled at the edge of the screen, unable to jump back. I wouldn't be too alarmed, though. Media Center likes to be center stage. My XP Media Center on my laptop hides the taskbar, so you have to either close or minimize MC, or hit the windows logo key as you said. It's been that way since 2005 at least. I wouldn't be surprised if this is what they wanted to happen with that update. My apologies that it is only speculation...

I think your windows media center is in touch screen mode. It happen to me before but i forgot how i fixed it

The mouse is constrained to the MC screen when run in full screen mode, change MC to a window to free your mouse.