Two JRE objects in Temporary Internet Files Objects

Hello,

One of my PCs (PIII 750 MHz 384 Mo WIN98SE) has recently been quite unstable, with low resources.
The list of objects of the Temporary Internet Files shows two “JRE 1.4.2” : could that be some source on unstability ? Could I delete one of these ?

Thanks for your help,

Jean-Jacques Vergier