CreateProcess error=2, The system cannot find the file specified

I can't find a fix for my problem. I know there is probably a forum for this. I thought I'd ask you about my problem I installed the CH340, (ch341); and all went well. NO errors in the device manager. BUT I get this error even with the built-in blink.ino A few months ago ALL work fine, but now I can't get ANYTHING to dump to my Nano. I did a complete deletion of Arduino and the CH340. I also blew away anything in the "registry", (yes I know what I doing in their)! I have 3 new Nano, so it's not them, and the Serial Port is correct...

When I click on verify, the following is what comes back immediately!!! Compiling Sketch: just says compiling sketch, and seems like it's hung up.

processing.app.debug.RunnerException at cc.arduino.Compiler.callArduinoBuilder(Compiler.java:316) at cc.arduino.Compiler.loadPreferences(Compiler.java:215) at cc.arduino.Compiler.build(Compiler.java:174) at processing.app.SketchController.build(SketchController.java:647) at processing.app.Editor$BuildHandler.run(Editor.java:1738) at java.lang.Thread.run(Thread.java:745) Caused by: java.io.IOException: Cannot run program "C:\Program Files (x86)\Arduino\arduino-builder": CreateProcess error=2, The system cannot find the file specified at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048) at processing.app.helpers.ProcessUtils.exec(ProcessUtils.java:26) at cc.arduino.Compiler.callArduinoBuilder(Compiler.java:296) ... 5 more Caused by: java.io.IOException: CreateProcess error=2, The system cannot find the file specified at java.lang.ProcessImpl.create(Native Method) at java.lang.ProcessImpl.(ProcessImpl.java:386) at java.lang.ProcessImpl.start(ProcessImpl.java:137) at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029) ... 7 more

pixster:
When I click on verify, the following is what comes back immediately!!! Compiling Sketch: just says compiling sketch, and seems like it's hung up.

What are the conditions? Same arduino IDE (compiler) software? Same computer? Same operating system? No changes?

Tools -> Board ---- using the correct board setting?

What things have changed (since last using it)?

@pixster, do not hijack. Thread split.