I have an Iomega 160 GB USB HDD that used to work with my desktop but now it only works with my laptop. I backed up my desktop and unplugged it and now it wont recognize it when i plug it in, even with the Y-adapter cable. I dont know if it's a power issue or something else.It works on other computers but not the desktop. please help! I really need it to work because I have to back up some VERY important data that I have to keep for a while.