Laura,
 J2SE is Sun's Java2 standard edition. Recently Microsoft lost a court case preventing them from using Java in their O.S., so Windows XP after, I believe, April 2004 does not contain Java.
It appears someone downloaded Java2 from the Sun web site for your use.
I don't recall what the various updates are for, however if you go to Sun's web site there is a description of all available updates and plug-ins.
HTH
Hal Seabolt
  ----- Original Message ----- 
  From: [log in to unmask]<mailto:[log in to unmask]> 
  To: [log in to unmask]<mailto:[log in to unmask]> 
  Sent: Monday, September 26, 2005 12:47 AM
  Subject: [PCSOFT] What is J2SE Runtime Environment?


  While searching under installed programs, I found J2SE Runtime Environment
  5.0 Update 1, 3 and 4 installed on my computer.  Each one takng up 118,00MB  of
  space.  Does anyone know what this is?  Do I need it?  Can I  remove it?

  Thanks in advance for your assistance.
  Laura Bruzas
  [log in to unmask]<mailto:[log in to unmask]>_ (mailto:[log in to unmask]<mailto:[log in to unmask]>)

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             PCSOFT maintains many useful files for download
                     visit our download web page at:
                  http://freepctech.com/downloads.shtml