Hello Lf, Very sorry to hear how terrible you found the keyboard with the MK345 Wireless Combo to be. You mentioned in the title something about it not being wireless. If you're having connection problems, be sure that the receiver is connected directly to your computer and not on a USB hub. Try plugging the receiver into a different USB port closer to your keyboard and mouse. Remove any metallic objects between the receiver and your keyboard and mouse. Check that you pulled the battery tab out of your keyboard and mouse. If none of these things resolves your connection issue, or if that wasn't the issue in the first place, here's a link to the product support page for the MK345: https://support.logi.com/hc/en-us/articles/360024317573--Getting-Started-Wireless-Combo-MK345. Here you'll find tutorials, software downloads, warranty information, and more. Hope that you found this helpful and that all is going well. Thank you for being a Logitech customer. - Richard from Logitech