No luck so far. Also can’t download that file cause the PC won’t connect to internet :/
As I said the .bat file can be run from a memory stick so if you have access to any working computer with a USB port you can download the file and transfer the stick to your system.
Also, you can try resetting Winsock and IP-stacks, although at least the latter has already been done by un/reinstalling the drivers. You can also try cleaning the DNS cache.
For resetting open the Command Prompt with Administrative privileges. It's under Start Menu>Accessories. Right click and Run as Administrator. In the Command Prompt type "netsh int ip reset resetlog.txt", of course without the quotation marks, and press Enter. After that type "netsh winsock reset catalog" and press Enter. Don't reboot yet, type "ipconfig /flushdns" and press Enter. Reboot.
Yet another trick to try is to reset your Internet settings. Go to the Control Panel, in the upper right corner choose Large or Small Icons instead of Category. Find Internet Options. On the last tab in the right, labeled Advanced, you'll find a button named Reset. Although it only says it will reset Internet Explorer, it affects all connections and browsers. Click, wait until finished, reboot.
For the USB mouse don't install any third party drivers, just uninstall everything mouse related in the Device Manager including USB Input Devices under Human Interface Devices. Under Universal Serial Bus Controllers you can even uninstall the Universal Host Controllers to reset your USB drivers.