Try version Java 6.0 you can get it at the link below. Make sure you uninstall all versions of Java through the control panel before you install 6.0 if 6.0 doesn't clear up the problem try 1.5 update 11
Archive: Download Java Platform Standard Edition (Java SE) 6 use jre-6-windows-i586.exe
The above link is 6.0 the link below you can find all versions of Java.
Archive: Java[tm] Technology Products Download
Edit The first link I left earlier was't working I have changed it click on the The (J2SE Runtime Environment (JRE) allows end-users to run Java applications) then choose the (jre-6-windows-i586.exe) for 6.0