diff --git a/Backend.py b/Backend.py
index bb937c8..f0c0b34 100644
--- a/Backend.py
+++ b/Backend.py
@@ -12,6 +12,7 @@ import time
 import math
 import tarfile
 from pathlib import Path
+import shutil
 
 
 
@@ -23,6 +24,22 @@ def get_tar_members_stripped(tar, n_folders_stripped = 1):
         members.append(member)
     return members
 
+def unzip(zip, dest):
+    for file_info in zip.infolist():
+        if file_info.is_dir():
+            continue
+
+        file_path = file_info.filename
+
+        extracted_path = file_path.split("/", 1)[1]
+        extracted_path = os.path.join(dest, extracted_path)
+        print(extracted_path)
+        os.makedirs(os.path.dirname(extracted_path), exist_ok=True)
+        with open(extracted_path, 'wb') as dst:
+            with zip.open(file_info, 'r') as src:
+                shutil.copyfileobj(src, dst)
+
+
 def install_java(mc_version):
     global data_dir
     tokens = mc_version.split(".")
@@ -56,6 +73,11 @@ def install_java(mc_version):
                 with tarfile.open(fileobj=buff) as tar:
                     print(tar.getnames())
                     tar.extractall(data_dir+"/java/java-"+str(java)+"-"+suff, members=get_tar_members_stripped(tar, 1))
+            else:
+                with zipfile.ZipFile(buff) as zip:
+                    unzip(zip, data_dir+"/java/java-"+str(java)+"-"+suff)
+
+
     return java
             
 
@@ -130,17 +152,19 @@ def perform_installation(instance_name, prism_command, prism_instance_path, pack
                         option_path = os.path.join(prism_instance_path, instance_name, "instance.cfg")
                         data = []
                         suff = "win"
+                        cmd = "java.exe"
                         if os.name == "posix":
                             suff = "lin"
+                            cmd = "java"
                         with open(option_path, 'r') as file:
                            data = file.readlines()
                         was_set = False
                         for ind, line in enumerate(data):
                             if line.startswith("JavaPath="):
-                                data[ind] = "JavaPath="+data_dir+"/java/java-"+str(java)+"-"+suff+"/bin/java\n"
+                                data[ind] = "JavaPath="+data_dir.replace("\\", "/")+"/java/java-"+str(java)+"-"+suff+"/bin/"+cmd+"\n"
                                 was_set = True
                         if not was_set:
-                            data.append("JavaPath="+data_dir+"/java/java-"+str(java)+"-"+suff+"/bin/java\n")
+                            data.append("JavaPath="+data_dir.replace("\\", "/")+"/java/java-"+str(java)+"-"+suff+"/bin/"+cmd+"\n")
                             data.append("OverrideJavaLocation=true\n")
                             data.append("OverrideJava=true\n")
                         with open(option_path, 'w') as file: