so i'm new to java and mods and I just downloaded java, optifine, and 2 different version of forge 1.8.9 and 1.14.3. I tried using the 1.8.9 version first for optifine and it worked but when I went to 1.14.3 it said "unable to install java" even though i downloaded it and it said successful then i deleted it and re downloaded it many times and idk what to do. someone please help me