Is it possible to force an application not to use 100% of cpu?

I will tell immediately that I have tried 3 different softwares to reduce the prority process from this application and they do not work! ==>CPU Usage:100% even on "idle"!!

The app is iPPlus, a 10 years old graphic editor. I simply can't live without because despite its obsolecy in many aspects, it's by far the easiest graphic app I'v used.

The problem is that it's invariably using all the cpu, even with no image open, making tasks with other programs (explorer for example) very slow. It doesn't crash my PC thought, and it uses practicaly no ram besides that.

Thanks for your help!

Well, you should post your system specs. Then, how "old" is the program? Lastly, changing the priority of an app will not drop it's CPU ussage. What it does is, it drops it's place in line when it requests CPU cycles. If there's free proccesor cycles available, it will take them, but the moment you open another app, the proc, will drop down and let the apps with normal priority ahead.

Hi, Murphy,

Thanks for this information.

The software "iPPlus" aka "iPhotoPlus" is copyrighted by U-Lead for/until(?) 1993.
It still uses w3.1 black-on-white "open" dialog displaying 8.3 names.
Except that it does most of any modern photo editor does.
Sometimes I can't open jpg files but that's almost a detail.

I notice that it stop running cycles like crazy when I open a menu (like "File"), but resume just after.

OS w98SE+uSP2.01a+various updates
P4 1.8Ghz - 512DDR - 120+40Gb HD - AsusV8100Deluxe/nVidia GF3 Ti200

Given the ancienty of the program, it could work easily with 10x less cpu power and memory.
Maybe I should run through a "slow computer" emulation.
I"v heard that there is some software emulating "slow computers" for test prupose. But that will reduce the speed at which the program is curently running (very fast).

snapshot ipplus