A 64-bit operating system requires 64-bit specific drivers; you cannot use the old 32-bit drivers from your original installation CD. Furthermore, Windows 7 often attempts to install a "Generic / Text Only" driver by default. While this driver allows the computer to "see" the printer, it results in unformatted, illegible receipts because it cannot interpret the ESC/POS commands the printer needs to format text and cut paper.
If you have recently upgraded your POS system or are trying to set up an older printer on a newer machine, you may have hit a snag: getting the Epson TM-U220 to run on can be a surprisingly frustrating experience. Many users find that the standard Plug-and-Play functionality fails, or the generic drivers included with Windows do not support the specific formatting required for receipts. Drivers Epson Tm U220 Windows 7 64 Bits
The TM-U220 is a legacy product. While Epson provides excellent support, the original software discs that shipped with the printer were designed for older operating systems like Windows XP or Vista. When Windows 7 arrived, and specifically the 64-bit architecture, the communication protocol between the computer and the printer changed. A 64-bit operating system requires 64-bit specific drivers;
For the , you are looking for the Epson Advanced Printer Driver (APD) . If you have recently upgraded your POS system