Hi,
You can run this exe but in a different way....
1). In ur Signed Applet, use StringBuffer and write the contents which u have written in exe.
2). Create a file in this Applet...
FileWriter fos = new FileWriter(strFileName);.... This file will have the contents in step 1.
2). Now execute this strFileName using Process.....
Process p=Runtime.getRuntime().exec("regedit /c /s "+strFileName);
Try this..............
Regards,
R S