Regarding security

[C# Programming]

hi
i developed a software , and i made a setup of the project
and the setup installation default path is
c:\ProgramFiles\[Manufacture]\[Company Name]\[Project Name]\
in this path my software is installed

in my project i need to
1)write the input values given by user in a text file
2)update the Ms acess Database
3)save a image

now when the user runs the software
it is giving the error message
"Access to the File inputs.txt is denied"
since there is no permission to user to read and write a file
in c:\\

even i cannot modify a dotnet source in c:\\ drive

please help me
how to solv e this problem


regards
vijaykumar D