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The shareware version of Ross-Tech's VAG-COM package - version 409.1 - was written in 2004, and so was never designed to work with Windows 7.
Ross-Tech have since released VCDS-Lite, which is compatible with Windows Vista / 7, and so is a better option.
However, should you still wish to use VAG-COM 409.1, it can be made to do so if installed correctly, using the steps below.
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Stage 1: Install the USB drivers for the interface
To get your interface up and running, you need to install software device drivers for the USB interface.
If you are installing the package on a PC that is connected to the internet, Windows 7 can automatically locate and install suitable drivers via Windows Update.
Just connect the interface to a USB port on the computer - Windows will then show a notification that it is locating and installing device drivers...
...and then another message when the installation is complete...
If the PC you are installing on is not connected to the internet, you will need to download the drivers via another PC and install them before connecting the interface. Windows 7 compatible drivers are available here:
Once the drivers are installed, you need to determine which COM port has been assigned to the interface by Windows. To do this you need to go into the Windows Device Manager.
Find the 'Computer' link on the desktop or the Start Menu, click the Right Mouse Button on it and choose Properties:
When the 'System' box appears, click on the Device Manager link on the left hand side:
Then when the Device Manager window appears, click on the arrow next to 'Ports (COM & LPT)' to see which COM port has been assigned to your interface - it will show as a 'USB Serial Port':
VAG-COM 409.1 can only connect to a COM port between COM1 and COM4.
- If the port number assigned to your interface is between 1 and 4, remember which port it's on, then skip to stage 3 - installing VAG-COM.
- If the port number assigned to your interface is higher than 4 (in the example above it is COM8), then you will need to change the port number.
To do this, double-click on the USB Serial Port to go into its properties, then click on the Port Settings tab:
Then click on the 'Advanced' button - this will show you a list of all the COM port numbers you could assign to the interface. Select a port number between 1 and 4 then press ok (if possible choose one that is not shown as 'in use'):
Once that is done, click ok until you are back to the Windows desktop.
Stage 3: Download and install the VAG-COM Software
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Next you need to download VAG-COM 409.1 from the Ross-Tech website:
www.ross-tech.com/vag-com/download/archives.html
(Use the link for version 409.1 - shown as 'For MODERN SERIAL Interfaces')
Save the file to your computer, then run it.
When installing VAG-COM on Windows 7, it is important that you do NOT install it within the 'Program Files' folder. Windows 7 protects this folder and prevents programs from writing files into it, which would prevent VAG-COM from working.
So when you see the screen showing the location for installation, change it to another folder, e.g. C:Ross-TechVAG-COM:
Once you have changed the installation location, click install, and wait for it to complete installation. The installer may not give a confirmation window - it may just disappear when it is finished.
Stage 4: Configure the VAG-COM softwareFinally there are a few changes you need to make to get the software up and running.
VAG-COM requires administrator access to function, so find the shortcut to 'VAG-COM Release 409-1', click the Right Mouse Button on it, and choose Properties.
Then on the Properties page, select the 'Compatibility' tab, and tick the option marked 'Run this program as an administrator':
Click on 'Apply', then 'OK'.
You may need to repeat this for the shortcut on the Start Menu.
That should be all the preparation done. The final step is to open the VAG-COM software by that shortcut, go into the Options page, then select the COM port your interface is configured on:
Once you've selected the port, click Test, then OK. You should now be able to use the software.
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Note: These instructions are only to be used in case the automatic driver installation is not successful. These instructions are for Windows XP. Installation under Windows 98/ME/2000 is similar, but not necessarily identical.
1. Make sure you have already downloaded and installed VAG-COM on your PC before following these instructions.
2. Allow the software you just downloaded to install itself on your PC. If you choose to install it someplace other than the default location, make a note of folder you're installing it to.
3. Plug your Ross-Tech USB Interface to your PC's USB port (It is not necessary to connect the interface to a car yet). A message like this should appear on your PC's Taskbar:
NOTE: If the new Hardware Found Wizard popup does not appear when you plug in your interface, go into Device Manager and look for the interface. In Windows XP, you can typically find the Device Manager by RIGHT-CLICKING on My Computer then selecting Manage. Your Ross-Tech USB Interface should be under Universal Serial Bus (USB) Controllers or under Other Devices. If it's there, Right-Click it and then select Update Driver. Then you can start at Step 4 in the instructions below.
4. The New Hardware Found Wizard should appear:
5. On the screen above, select 'Install from a list or specific location (Advanced)'
then click the [Next >] button.
6. The following dialog should appear:
7. On the screen above:
Select 'Search for the best driver in these locations'
Check 'Include this location in the search:'
Use the [Browse] button to find the VAG-COM folder
(Usually C:Program FilesVag-Com,
unless you chose a different folder when you installed the software)
Click [OK]
8. The following dialog should appear:
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9. Click the [Next >] button.
10. If you get a Windows message stating 'This hardware will not be installed. Contact your system administrator' then you need to do the following
A) Login to Windows with Administrator rights.
B) Go into Start -> Settings -> Control Panel -> System -> Hardware -> Driver Signing
C) Select Warn and choose 'Prompt me each time to choose an action.'
D) Next, repeat the driver installation starting in Step 3.
11. The following dialog should appear:
12. This dialog warns you that we haven't paid Microsoft a pound of flesh to certify the driver.
You're going to have to click the [Continue Anyway] button..:-) Note: If your Windows Security Settings policy is 'undefined' you may need to set it to 'warn' to be able to continue.
13. The following dialog should appear:
14. Click the [Finish] button to complete the installation.
15. Start VAG-COM.
Click the [Options] button.
In the 'Select COM Port' box, select USB.
Click the [Test] button.
The results should look like this (it may have additional information in the Port Test dialog).
16. Click [OK] and click [Save]
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17. Go test it on a car. :-)