Farhad wrote:
Hello,

Actually, I have problem with installing software in vista,
At first this installation request to access to registry, and i face to
below error message:

Error performing installer tasks - System.Security.SecurityException:
Requested registry access is not allowed...

*ORION_V2._0 is name of my software...

My guess is that orion is not yet compatible with Vista. I used google
to search for orion and I got too many responses for me to tell what
your software does. Does the maker of orion say that it should work
with Vista?

Then I have solved this problem...

Please tell us how you solved it!