Wait, if this is immediately after you install, you may have corruption, Run as administrator:
C:\>SFC /SCANNOW
write in detail your current setup and how are trying to install, This is a manual I wrote sometime ago:
DiagBox 7.xx Preperation to Operation
Prerequisites:
1- Ensure that all files and folders names do NOT include spaces or funny characters, example: “Folder_1or_file_5” and not “Folder 1 or file 5”.
2- If possible, convert all your media to ISO format ensuring the media is laid at the root directory and NOT inside another folder, Example: if you mount the DVD ISO it should be “G:\installation_material.exe” and NOT “G:\ Diagbox\Lexia 3\installation material.exe” (where G is the arbitrary DVD drive letter)
3- Hard Drive controller MUST be set to Legacy/IDE not AHCI in the BIOS (If installing on the PC).
4- Hard Disk partition type is MBR not GPT (Win 8+)
Virtual Machine:
1- Install VirtualBox or VMplayer and the extensions/tools ensuring the following:
a) Ensure that the Hard Disk controller is set to IDE not SCSI.
b) Create a preferably fixed hard drive more than 20-36GB preferably contiguous. Dynamic also works.
c) Connect the Windows ISO through the Settings
à Storage menu.
d) Install VirtualBox Guest Additions or VMWare Tools after installing Windows.
Windows Installation:
1- Install a clean Windows XP Pro SP3, activate it and install the following tools:
a) Install VirtualBox Guest Additions or VMWare Tools after installing Windows if installing on Virtual Machine.
b) Microsoft .NET 3.5 SP1 Framework
c) All necessary drivers.
d) Setup a network adaptor
e) Mozilla Firefox
f) Java 6 or 7
g) 7zip or winrar
h) Virtual Clonedrive (not needed for VirtualBox)
XS Evolution Connection:
1-Connect the Lexia USB interface to the computer so that VirtualBox identifies it:
- Click on VirtualBox Settings, USB, add a new USB filter and choose the code representing Lexia interface. VMWare recognises the hardware.
- Leave the Lexia interface connected throughout the whole installation process, if Windows asks to look for drivers then just cancel for now.
DiagBox Installation:
- Disconnect the network cable/connection.
- Create a blank file named version.txt and saved to the root directory i.e “C:\version.txt” (This step may not be necessary with newer DiagBox versions).
- Mount the DiagBox 7.02 ISO and run the setup, go through the process. At some stage, "new hardware found" message will appear, do not choose to search automatically for drivers, you may cancel it or just manually select the driver that should now be available.
- Start DiagBox and when prompted for activation, choose the "manual activation" option, fill-in information as per the provided instructions. DiagBox will start as v7.01.
- Reboot the computer and restart DiagBox again, it will run the internet updates (even if not connected to the net) and will open as V7.02.
Updates:
Install the update package/s as follows:
- Please note that after installing each update you will need to reboot the computer then run DiagBox again for the update to be fully installed. At some stage, you may get "New hardware found" wizard again, ignore if already installed.
- After DiagnBox v7.02 install v7xx-757 -> 7.57-7.58 -> 7.58-7.62 -> 7.62-7.66 -> (7.66-7.72 if you wish to stay with ISO 639-1) or 7.66-7.74 -> 7.74-7.76 -> 7.76-7.82, etc…
The latest version of DiagBox is now operational. Connect the USB interface to the OBD-II port on your car, turn the ignition on, and in DiagBox choose your car and work away.
Simple.