Minolta dimage 7hi digital camera with screw on lens photos out of focus?

I can't seem to get the lens to focus all the photos are out of focus.
If i auto focus they are blurry and if i manual focus they are blurry.
they look clear in the view finder but are not when i put them on the computer. How can I overcome this problem?

no i did not know that . but i have blurry images either way. If i manually focus it looks clear but comes out blurry

you do know that there are lens for auto focus and manual focus.