I've tried many of screen magnifier I could find, but I found Magic Lens Max is the best one. It's 30-day free trial.

Paid for it..had to recover WinVista..reinstalled and reapplied key..didn't work..user support is weak- only email back and forth..reinstalled again and reapplied key..now the magnification is in the lens border only and the lens itself is opaque.. difficult to troubleshoot when you can only configure it while running it and the lens is opaque..a lot of promise but looks like the developers lost interest when it came time to polish it.