Desmadre Hi.
From what you say & what I see, everything looks fine, if Time Warner fromerly Adelphia is telling the truth.

Turn Norton Back on,Go to Program permisions and delete permisions for L/W
ReStart computer, then Start L/W.
LimeWire should reapply for permisions, Give Full permisions for L/W to pass
If this dont work, Something is curupt so you will have to folow instructions
Here.
Sounds like things have become jumbled.

Follow thease instructions exactly.
So, you need to Go, Start/All Programs/LimeWire n Uninstall all L/W versions.
Do Not Uninstall From Change or Remove Programs.
Re BOOT Your computer NOW.

Now Go to, Start/Search/click on all files n folders/more advanced options/
& make sure, case sensitive, is not ticked. (all other boxes should be ticked)
Now!!, Put limewire in box, (all or part of file name) & click search.
Delete everything found, including Prefetch folder, (I mean everything)
Re BOOT Your computer NOW.

Now! Go to,
START/Set Program Access/Change or Remove Programs,
now completely remove all versions of java.
Re BOOT Your computer NOW.

Now! Use this Link to get JRE 6, Use the off line installer, NOT the (recormended) one,
http://java.sun.com/javase/downloads/index.jsp
When Download is completed.
Disconnect from internet, close ALL apps n reinstall java.

Now!! Use this link to download latest L/W version using the off line installer
http://www.limewire.com/
If you need help, Shout, If it fixed your problem or not, Feedback helps others.
Peace

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mickjapa108