Dell has not published official Windows 10 Drivers for Vostro 3450. But the following drivers work quite well (you can search the name in internet to get the download link). The drivers have been listed as per their installation order.
DellVostro 3458 Drivers Download. Download DellVostro 3458 driversforwindows10 64bit version. Please select suitable driver to download like WiFi, LAN, VGA, USB, Chipset, TouchPad, Bluetooth or Bios for your DellVostro 3458 from below links. Install Dell Vostro 3350 laptop drivers for Windows 10 x64, or download DriverPack Solution software for automatic drivers intallation and update. Audio Driver for Dell Vostro 1015 for Windows 10 64-bit. HP 246 Laptop Wireless LAN (WiFi) Network (Broadcom) driver for Windows 8 32-bit and Windows 8 64-bit. Please click the download lin. Ati Legacy Drivers Windows 10 more. 802.11 N Wlan Adapter Driver Windows 10 here.