Hello. Bought laptop with Vista pre-activated last Sept. Used ABR to backup, then restore the activation files when I wiped factory install and used nLite for a new, custom install. Finally got around to installing the free W7 upgrade last week. Here's where it gets tricky. I imaged Vista in C:\, then restored the Vista image to D:\, so I could install W7 in C:\. (Now bear with me b/c while it seems I am going off-track, I think this might have something to do with the ultimate problem regarding the Daz loader...) So I installed W7 in C:\, but when I booted to Vista in D:\, the desktop wouldn't come up b/c it thought it was still in C:\, so it was looking in the W7 C:\ drive, instead of in its own. (A gorky version of the W7 desktop would try to come up inside Vista!) So I did a reg edit in Vista, swapping C:\ and D:\ so that when Vista loads, it thinks it is in C:\ and sees W7 as being in D:\. That fixed the problem, and Vista runs great, as does W7. Back to the problem now. So, Vista is factory pre-activated in D:\, and I use the Daz loader (nice, Daz!) on W7 in C:\. It worked great and all was well... until I tried to boot to Vista. I got the "this is not a genuine copy of Vista" and "activate now" errors. Followed the directions in the Repository guide on dual boots, where it says to run the Daz loader in Vista, after running it in W7. I ran it in every mode in Vista, but it didn't take, even though I got the message that it completed the task successfully. Upon reboot though, no joy. So I used the UNINSTALL button on the loader (inside Vista), and rebooted, and it very politely put all the factory-activated files back on Vista so that it boots fine again... but now W7 is not activated. One more thing...when I run the commands slmgr -dli etc to see activation status in Vista, I get an error, even though Vista reports it is activated in Ctl Pnl/System. I am thinking the error is because of the reg edit where I have Vista believing it's in C:? The error is: Script: C:\windows\system32\slmgr.vbs Line: 1648 Char: 9 Error: the data is invalid Code: 8007000D Source: (null) I'm wondering, if I did not have to do that reg edit in Vista swapping the drive letters, would the loader have broken Vista at all? Any suggestions on how to activate W7 with a loader and leave Vista intact? Thanks for reading!