I've uninstalled .NET Framework 4.5 and installed (downgraded) it to 4.0 to check if it was a version problem. Didn't work either. But I've tried to install it on another laptop and it worked fine with .NET framework 4!
So .NET framework is discarded as a problem since I have the same version at two different computers, one working and one not working...will investigate more tho.

Thanks for the fast reply anyways...

EDIT: Tried to execute the software on the laptops (yes, 2 different laptops, we're a large family) and it stutters, close unexpectedly...it's a really really crappy software. I use this thread as a review (maybe even the first across the searchable internet) about the EHash.com Avalon Nano and discourage users to purchase it. USB miners should be focused on keeping things simple for miners and in this case is being quite the opposite. Bad purchase at this time. We'll see in the future with the needed software updates (if they release someday).

Kind regards.

PS: If someone finds out how to make an Avalon Nano to work with BFGMiner, CGMiner, GUIMiner or whateverminer, please just post it so we can all benefit that wisdom!!

Hi dogie,
I've recently purchased 1 Avalon Nano (https://ehash.com/product/avalon-nano/) just to try it out and mine a little just for fun (I'm not a hardcore miner but I consider the Bitcoin idea interesting and want to support it trying mining a little).

I've tried following the install instructions (http://downloads.canaan-creative.com/software/avalon_nano/doc/Avalon%20Nano%20User%20Guide(English).pdf), so I downloaded the AvalonInstaller.msi (http://downloads.canaan-creative.com/software/avalon_nano/software/latest/AvalonInstaller.zip) but when trying to install it windows rejects it, trowing the next error: http://i40.tinypic.com/o085xc.png (the image is taken from other place but it's exactly the error I'm having). I'm trying to install the drivers/GUI in a Win7 x64 OS. Also tried in another computer, both with admin privileges ofc, and got the same error.

I've also tried contacting with someone via IRC since there's no support e-mail (only sales e-mails) and none answered so...here I am.

Googling the product and the commented problems led me here, so I guess this is a nice place to try to fix my problem, warn users about it, and check if someone has already solved it!

I'm waiting for that support eagerly!

Kind regards.