Hi, While installing the Pega 8.4 Personal Edition , I recieve bekow error .

Can any one  please let  me know how to resolve it.

I have attached logs with it.

My System Have : 4gb RAM , Windows 7 ultimate

Logs:

BUILD FAILED
E:\PegaSoftware\pegaGuiInstallerTemp\build.xml:250: Execute failed: java.io.IOException: Cannot run program "cscript" (in directory "E:\PegaSoftware\pegaGuiInstallerTemp"): CreateProcess error=2, The system cannot find the file specified
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)
    at java.lang.Runtime.exec(Runtime.java:620)
    at org.apache.tools.ant.taskdefs.launcher.Java13CommandLauncher.exec(Java13CommandLauncher.java:58)
    at org.apache.tools.ant.taskdefs.Execute.launch(Execute.java:428)
    at org.apache.tools.ant.taskdefs.Execute.execute(Execute.java:442)
    at org.apache.tools.ant.taskdefs.ExecTask.runExecute(ExecTask.java:628)
    at org.apache.tools.ant.taskdefs.ExecTask.runExec(ExecTask.java:669)
    at org.apache.tools.ant.taskdefs.ExecTask.execute(ExecTask.java:495)
    at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
    at sun.reflect.GeneratedMethodAccessor10.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
    at org.apache.tools.ant.Task.perform(Task.java:348)
    at org.apache.tools.ant.Target.execute(Target.java:435)
    at org.apache.tools.ant.Target.performTasks(Target.java:456)
    at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1393)
    at org.apache.tools.ant.Project.executeTarget(Project.java:1364)
    at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
    at org.apache.tools.ant.Project.executeTargets(Project.java:1248)
    at org.tp23.antinstaller.antmod.Main.runBuild(Main.java:710)
    at org.tp23.antinstaller.antmod.Main.startAnt(Main.java:218)
    at org.tp23.antinstaller.antmod.Launcher.run(Launcher.java:216)
    at org.tp23.antinstaller.runtime.exe.AntLauncherFilter.exec(AntLauncherFilter.java:79)
    at org.tp23.antinstaller.runtime.ExecInstall.exec(ExecInstall.java:88)
    at org.tp23.antinstaller.selfextract.SelfExtractor.main(SelfExtractor.java:398)
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.<init>(ProcessImpl.java:386)
    at java.lang.ProcessImpl.start(ProcessImpl.java:137)
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
    ... 25 more

Total time: 20 minutes 52 seconds
org.tp23.antinstaller.InstallException: Use logs to find the cause, then correct and run again 
    at org.tp23.antinstaller.runtime.exe.AntLauncherFilter.exec(AntLauncherFilter.java:91)
    at org.tp23.antinstaller.runtime.ExecInstall.exec(ExecInstall.java:88)
    at org.tp23.antinstaller.selfextract.SelfExtractor.main(SelfExtractor.java:398)
Caused by: org.tp23.antinstaller.InstallException: Use logs to find the cause, then correct and run again 
    at org.tp23.antinstaller.runtime.exe.AntLauncherFilter.exec(AntLauncherFilter.java:81)
    ... 2 more
--- Nested Exception ---
org.tp23.antinstaller.InstallException: Use logs to find the cause, then correct and run again 
    at org.tp23.antinstaller.runtime.exe.AntLauncherFilter.exec(AntLauncherFilter.java:81)
    at org.tp23.antinstaller.runtime.ExecInstall.exec(ExecInstall.java:88)
    at org.tp23.antinstaller.selfextract.SelfExtractor.main(SelfExtractor.java:398)

***Edited by Moderator Marissa to update Platform Capability tags****