diff --git a/DOCUMENTATION.md b/DOCUMENTATION.md
index ea6e7e9..b087211 100644
--- a/DOCUMENTATION.md
+++ b/DOCUMENTATION.md
@@ -4,7 +4,7 @@
 
 # Install
 
-Please refer to the README file,all install steps are described.
+Please refer to the README file, all install steps are described.
 
 ## Pipx
 
@@ -12,30 +12,59 @@ Not refered in the install, but you can pipx for you install.
 
 # Virtual Server Creation
 
-##List os update
-
 ##Linux
 
+For the moment, no issue with tested distribution:
+  - Archlinux
+  - Debian/ubuntu
+  - Centos/Fedora/Redhat
+  - FreeBSD
+  - TinyCore
+
+##Other install
+
+Tested succeffully :
+  - Pfsense,Dynfi,Open
+
 ##Windows
 
-Windows OS will need some extra-drivers to run.
-For this during the install, the VM will mal a virtuo-win iso with all drivers.
+Windows OS will need some extra-drivers to run on virtualized server.
 
-Virtuo can be found here :
+For this during the install, the VM will need a virtIO-win iso with all drivers.
+The VirtIO iso is already mounted as a CD-ROM on VM creation. Load the drivers according to you OS install.
+
+###VirtIO
+
+VirtIO is a QEMU drivers for Windows OS (please read : https://developer.ibm.com/articles/l-virtio/)
+
+VirtIO can be found here :
 https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/archive-virtio/?C=M;O=D
 
+Take care of the version, some virtio are not compatible with some Windows version.
+
 This iso is on ./storage/win/ and configured in **config.py** for upgrade.
 
-Tested Windows Install:
-Curent testing : 
-Windows Server 2022
-Windows 11
+###Tested Windows Installation (tested with Virtio 0.1.229):
+
 Validate for :
-Windows 8, 8,1 10
-Windows Server 2019
+  - Windows 8, 8,1 10
+  - Windows Server 2019, 2022
+
 Failed with :
-Windows 98, Windows XP
+  - Windows 98, Windows XP, Windows 11 (UEFI access)
+
 Never Tested :
-Win 7 and Vista
+  - Win 7 and Vista
 
 
+#ERROR and SOLUTION
+
+You may incounter some error in specific case, please report them if they are not in the list,
+They will be consider on nexts releases.
+
+ERROR: Error destroying Requested operation is not valid: cannot undefine domain with nvram :
+SOLUTION (on CLI): virsh undefine --nvram VM_NAME
+
+ERROR: Error stoping NOM_VM:Requested operation is not valid: domain is not running
+SOLUTION 1 (on CLI): virsh reset VM_NAME
+SOLUTION 2 (on CLI): virsh destroy VM_NAME (destroy the VM)
diff --git a/app.py b/app.py
index 32bb22e..59bb2be 100644
--- a/app.py
+++ b/app.py
@@ -415,7 +415,7 @@ def create_VM():
     ostype = 'linux'
 
 ####################################
-##              WIN               ##
+##         WINDOWS                ##
 ####################################
 
     if ose.startswith('win'):
@@ -425,14 +425,12 @@ def create_VM():
         except Exception as e:
             flash('Error on creating '+str(nom)+':'+str(e),category='danger')
             return redirect(url_for('state'))
-        opt = " --disk path="+virtuo_path+"virtio-win-0.1.229.iso,device=cdrom"
+        opt = " --disk path="+virtuo_path+virtuo_file+",device=cdrom"
         ostype = 'windows'
         diskpath = "  --disk path="+str(virtuo_path)+str(nom)+".qcow2,size="+str(disk)+",bus=virtio"
         creationcmd='--name '+str(nom)+' --ram '+str(ram)+' --disk path='+str(virtuo_path)+str(nom)+'.qcow2,bus=virtio,format=qcow2 --vcpus '+str(cpu)+' --os-type '+str(ostype)+' --os-variant '+str(ose)+' --network network:bridged --graphics vnc,listen=0.0.0.0 --noautoconsole --console pty,target_type=serial '+opt+' --cdrom '+str(iso)+' --force --debug '
-        print("OS WINDOWS:"+creationcmd)
     else:
         creationcmd='--name '+str(nom)+' --ram '+str(ram)+' --disk pool=default,size='+str(disk)+',bus=virtio,format=qcow2 --vcpus '+str(cpu)+' --os-type '+str(ostype)+' --os-variant '+str(ose)+' --network network:bridged --graphics vnc,listen=0.0.0.0 --noautoconsole --console pty,target_type=serial '+opt+' --cdrom '+str(iso)+' --force --debug '
-        print("OS LINUX:"+creationcmd)
     try:
         os.system('virt-install '+creationcmd+' ')
         flash(str(nom)+' created', category='success')