IOException in launching NetBeans

I recently installed NetBeans and now after installation when iam trying to start NetBeans Iam getting this

C:\Program Files\netbeans-5.5\bin>nb.exe
java.io.IOException: The system cannot find the path specified
at java.io.WinNTFileSystem.createFileExclusively(Native Method)
at java.io.File.createNewFile(File.java:883)
at org.netbeans.CLIHandler.initialize(CLIHandler.java:451)
at org.netbeans.CLIHandler.initialize(CLIHandler.java:291)
at org.netbeans.Main.execute(Main.java:161)
at org.netbeans.Main.main(Main.java:48)
java.io.IOException: The system cannot find the path specified
at java.io.WinNTFileSystem.createFileExclusively(Native Method)
at java.io.File.createNewFile(File.java:883)
at org.netbeans.CLIHandler.initialize(CLIHandler.java:451)
at org.netbeans.CLIHandler.initialize(CLIHandler.java:291)
at org.netbeans.Main.execute(Main.java:161)
at org.netbeans.Main.main(Main.java:48)
java.io.IOException: The system cannot find the path specified
at java.io.WinNTFileSystem.createFileExclusively(Native Method)
at java.io.File.createNewFile(File.java:883)
at org.netbeans.CLIHandler.initialize(CLIHandler.java:451)
at org.netbeans.CLIHandler.initialize(CLIHandler.java:291)
at org.netbeans.Main.execute(Main.java:161)
at org.netbeans.Main.main(Main.java:48)
java.io.IOException: The system cannot find the path specified
at java.io.WinNTFileSystem.createFileExclusively(Native Method)
at java.io.File.createNewFile(File.java:883)
at org.netbeans.CLIHandler.initialize(CLIHandler.java:451)
at org.netbeans.CLIHandler.initialize(CLIHandler.java:291)
at org.netbeans.Main.execute(Main.java:161)
at org.netbeans.Main.main(Main.java:48)
java.io.IOException: The system cannot find the path specified
at java.io.WinNTFileSystem.createFileExclusively(Native Method)
at java.io.File.createNewFile(File.java:883)
at org.netbeans.CLIHandler.initialize(CLIHandler.java:451)
at org.netbeans.CLIHandler.initialize(CLIHandler.java:291)
at org.netbeans.Main.execute(Main.java:161)
at org.netbeans.Main.main(Main.java:48)
Cannot create system directory in C:\Documents and Settings\Computer1\.netbeans\5.
5\config.

Please help me out !!!

Is it realated to this bug report:

Bug Report (http://www.netbeans.org/issues/show_bug.cgi?id=40318)

It looks like there are maybe two instances of netbeans running, but you'd have to read through it completely to verify.

i have uninstalled all ie., java se, jre and net beans and did a clean install of all but it is still the same, is there a way know if there is any version not completely uninstalled.please help me out.--thanks