Build folder disappeared or could not be written in Windows XP!

Using Arduino IDE 1.x
2

I'm also having a problem. It's been working fine for months, but now it isn't working!
Here's the error message:

Build folder disappeared or could not be written

java.io.FileNotFoundException: C:\Users\MyName\AppData\Local\Temp\build1566705018473219673.tmp\Trying_to_program_Remote_Control_TEAC_1.cpp (The system cannot find the path specified)
	at java.io.FileOutputStream.open(Native Method)
	at java.io.FileOutputStream.<init>(FileOutputStream.java:179)
	at java.io.FileOutputStream.<init>(FileOutputStream.java:131)
	at processing.app.preproc.PdePreprocessor.writePrefix(PdePreprocessor.java:139)
	at processing.app.Sketch.preprocess(Sketch.java:1387)
	at processing.app.Sketch.preprocess(Sketch.java:1339)
	at processing.app.Sketch.build(Sketch.java:1620)
	at processing.app.Sketch.exportApplet(Sketch.java:1648)
	at processing.app.Sketch.exportApplet(Sketch.java:1634)
	at processing.app.Editor$DefaultExportHandler.run(Editor.java:2346)
	at java.lang.Thread.run(Thread.java:619)
processing.app.debug.RunnerException: Build folder disappeared or could not be written
	at processing.app.Sketch.preprocess(Sketch.java:1394)
	at processing.app.Sketch.preprocess(Sketch.java:1339)
	at processing.app.Sketch.build(Sketch.java:1620)
	at processing.app.Sketch.exportApplet(Sketch.java:1648)
	at processing.app.Sketch.exportApplet(Sketch.java:1634)
	at processing.app.Editor$DefaultExportHandler.run(Editor.java:2346)
	at java.lang.Thread.run(Thread.java:619)

What's wrong? I browsed for the folder and the folder AppData wasn't there!
Any solutions?