I have a dual-boot system and what I am trying to accomplish is activation of Both Vista x86 on one partition and Win7 x64 on another hard drive. I modified my bios with the Dell SLIC v2.1 (Dell.bin + Dell.xrm-ms) Windows 7 x64 activates fine, but Vista .x86 on the other drive will not. I've tried 3 Pkeys with the Dell.xrm-ms license, when I go to run 'slmgr -ato', it returns -'Error: Product not found'. I've tried 'slmgr -rilc c:\Dell.xrm-ms' also. (I've also done this with the Lenovo & HP slics v2.1, thinking something in the certificates were wonky. They work the same way, Win7=validated Vista=no.) Vista validates fine using an emulator, which uses an SLIC v2.0, so it of course invalidates the Windows 7 activation until I remove it. I'm thinking this bios flashing should work to activate both as all I would need to do then is run 'slmgr' in both environments with the Dell or other certificate and keys for Vista x86 and Win7 x64, respectively. So what am I missing? It's been said this should work, all I have left in my brain to troubleshoot with is that somehow I don't have the right combination of slic2.1, cert, and pkey, but I really don't think so. Am I thinking correctly? I've rebooted as often as I thought it might matter. Man, I just can't figure it no good. Thanks very much in advance for any help.