Java SE (Java Platform, Standard Edition)

My Problem is this the day after i installed J2SE Java quit working with a red X in the corner of all applets.I checked the help article pertaining to RED X.Did what it told me EXACTLY as it told me.DID NOT worked so i reinstalled and installing worked.but not java applets.So i did a restore to when it did work.STILL DIDN"T WORK!!!.so i checked some sites including this one.And was advise to uniunstall and then reinstall.WELL thats when the problem got worse install told me this word for word. It tells me This " You already have this version of the JRE installed.Please Uninstall the product through your add/remove progrms utility before reinstalling." So i went to Add/Remove programs to uninstall and got this message " You already have this version of the JRE installed.Please Uninstall the product through your add/remove progrms utility before reinstalling." so now ive been restoring and rolling back and deleting this and that.Including all instance of java.and still have the same problem.

OHH!! and this may be important JAVA WORKS in Opera but a A little bit slow and stuttery performance. My computer Discription is below.DOes Sun have a program that uninstalls all java.And why doesnt a new installation just overwrite or uninstall previous version.PLease help been dealing with this for DAYSSSS.................

Joe

Computer Manufacturer: HP Pavillion
Computer Model:M1270n
Operating System:Windows XP Media Center SP2
CPU:Intel pentium 4 3.00 GHz Ht technologie
Hard drive size:250 G
Amount of memory installed:1g
Sound card:Realtek
Video adapter:Radeon 300
When did the problem start:After installing Java Runtime Environment Version 5.0 Update 4