After changing ink cartridge, the printer will work for a little while, then go into alarm- don't recognize cartridges'. After removing & installing ink a few times, still have error. Change the ink for a new one, it works. Then later you get the same alarm for a different color. However the ink cartridge is basically full. This problem only started when I got a new computer & put the Epson program on it. The old program NEVER gave this problem. Don't blame the computer or printer. Epson has made the issue in their programming. HOW do you put your program back to normal, without holding my printer as hostage to buy more of your ink. Obviously I'm hearing the same problem everywhere. Epson is not environmentally conscious if consumers have to waste ink.