application software

As I mentioned in some other thread, for work-related reasons I had to install Win7. Now I’ve got a few questions regarding security and system software.
When you google for it, you’ll get thousands of applications that are supposed to do thousands of things to keep your windows computer clean and secure.
Half of them are probably malware. I haven’t properly used or maintained a windows system for a long time so I’m slightly out of the loop.
1. Which antivirus application software would you recommend?
2. Are there any other kinds of programs that I need for windows to minimise the threats out there?
3. What about registry cleaners? Are they helpful? If so, which one would you recommend,business
finance softwar.
4. Any other business finance softwar programs that are recommended for maintaining a windows
system?I spent two days mostly on the phone with Garmin trying to get my Mapsource products installed on my new PC and then unlocked to the particular Garmin
units I had and then… at some point during this tedious process, my Garmin Dakota 20 operating system disappeared and I have to send it back along with $80
(like this was all my fault), to get it fixed. Pretty disappointed with Garmin.