The problem is that kernel drivers need to be signed, and we have recently had to renew our signing certificate (they expire every year). Our new certificate is now created using SHA-2 instead of SHA-1 and if your computer (I assume it is win7 or Server 2008 R2) has not had all the Windows updates applied so it can support the new certificates. Windows OSes newer than win7 have support out-of-the box for this. Windows Vista and Server 2008 do not, and there is NO update from Microsoft, so if you are using that OS you need to upgrade.  The problem and solution is detailed in the release notes:  [URL]  
Hello, i'm trying to install atmos geodrive on win7 pro x64 and during installation i get error. [IMAGE] I've changed windows settings to ignore unsigned drivers but it didn't help. All buttons in geodrive are grayed out (inactive). Please help.
Atmos GeoDrive installation problem