What's the exact error message that comes up? If it says something like "This software is not from Nokia and may harm your system" then don't worry about it, just click "Okay" and keep going. The application manager i can't keep going. it just closes. and if i open to install it again it will say the same thing and close again. when you buy n810 from different stores do they come with differnt softwares like a PC/laptop would? Cause i got my laptop from a different source.