diff --git a/src/main.py b/src/main.py
index 382eef5..01e7232 100644
--- a/src/main.py
+++ b/src/main.py
@@ -55,11 +55,13 @@ class mainWindow(Tk):
         self.Tags = []
         self.compliance = True
 
-        # Get the screen size
+        # Hide during construction
+        self.withdraw()
+
+        # Get the screen size and center
         ws = self.winfo_screenwidth()
         hs = self.winfo_screenheight()
         logfile.printdbg('Launching main window with resolution' + str(ws) + 'x' + str(hs))
-        self.grid()
 
         # Configuring the size of each part of the window
         self.grid_columnconfigure(0, weight=1, minsize=(ws / 2 * 0.3333333333333333))
@@ -201,7 +203,6 @@ class mainWindow(Tk):
         self.terminal.grid(column=0, row=2, sticky='EWNS', columnspan=2, padx=5, pady=5)
         self.terminal2.grid(column=0, row=1, sticky='EWNS', columnspan=2, padx=5, pady=5)
         self.monitor.grid(column=2, row=1, sticky='EWNS', columnspan=1, rowspan=2, padx=5, pady=5)
-        self.update()
 
         # What is a window without a menu bar ?
         menubar = Menu(self)
@@ -229,19 +230,21 @@ class mainWindow(Tk):
         # Make this window resizable and set her size
         self.resizable(width=True, height=True)
         self.minsize(self.winfo_width(), self.winfo_height())
-        w = int(self.winfo_width())
-        h = int(self.winfo_height())
+        self.update()
+        w = int(self.winfo_reqwidth())
+        h = int(self.winfo_reqheight())
         ws = self.winfo_screenwidth()
         hs = self.winfo_screenheight()
-        x = ws / 2 - w / 2
-        y = hs / 2 - h / 2
+        x = (ws - w)/2
+        y = (hs - h)/2
         self.geometry('%dx%d+%d+%d' % (w, h, x, y))
+        self.update()
+        self.deiconify()
 
         # Some bindings
         self.termtext.bind('<Key>', self.entryValidation)
         self.termtext.bind('<<Paste>>', self.pasteValidation)
         self.speed731text.bind('<Control_R>', self.speedValidation)
-        self.update()
         logfile.printdbg('Initialization successful')
 
     def stringValidation(self, keysym):
diff --git a/src/updater.py b/src/updater.py
index 217ccc0..727705e 100644
--- a/src/updater.py
+++ b/src/updater.py
@@ -79,6 +79,47 @@ def exitProcess(arg):
             process.terminate()
     sys.exit(arg)
 
+def runPowershell(scriptblock, cwd=os.getcwd()):
+    """
+    Executes a powershell command
+    """
+    log.debug("Running PowerShell Block:\r\n%s", scriptblock)
+    log.debug("Current Directory: %s\r\n" % cwd)
+    psProc = subprocess.Popen([r'C:\WINDOWS\system32\WindowsPowerShell\v1.0\powershell.exe',
+                                '-ExecutionPolicy', 'Bypass',
+                                '-noprofile',
+                                '-c', '-',],
+                                cwd=cwd,
+                                stdin=subprocess.PIPE,
+                                stdout=subprocess.PIPE,
+                                stderr=subprocess.PIPE)
+    stdoutdata, stderrdata = psProc.communicate(scriptblock)
+
+    if stdoutdata:
+        log.debug("Script Output:\r\n%s" % stdoutdata)
+    elif not stderrdata:
+        log.debug("Script completed succssfully (no stdout/stderr).")
+    if stderrdata:
+        log.error("Script Error:\r\n%s" % stderrdata)
+
+    return stdoutdata, stderrdata
+
+
+def getCertificates(server_list, location="LocalMachine", store="My"):
+    """
+    Returns the json data of all installed certificates
+    """
+    cmd = '''
+$sb = { ls Cert:\%s\%s | Select Subject,ThumbPrint }
+$Servers = '%s' | ConvertFrom-Json
+
+Invoke-Command -ComputerName $Servers -ScriptBlock $sb -Authentication Negotiate | ConvertTo-Json -Depth 999
+    ''' % (location, store, json.dumps(server_list))
+    stdoutdata, stderrdata = runPowershell(cmd)
+    return json.loads(stdoutdata)
+
+
+
 def getLatestVersion(credentials):
     """
     Returns the latest version of the software