Computer wont recognize 2 of my USB's! Help?!

Hello,

I have 2 USB's and an external hard drive at the moment. I am having trouble getting the 2 USB's to work at all on my computer. The first one stopped working a couple months back, but I didnt worry to much about it because it was only a 2GB USB, and I had a 16GB that I could use. A couple hours ago the exact same thing happened to my 16GB USB after I used the "Safety Remove Hardware" option when I was plugging it into my Xbox 360. Now every time I plug in either USB into any computer (I have tried more then one PC) I get the "USB Device is Not Recognized" message. I will give you details on what I am using and the things I have tried to fix the problem already so you are clear.

I have Windows 7 Ultimate 32 bit.

The USB's are made from different manufacturer and are totally different in size.

They both stopped working at random times.

I have tried plugging them both into different computers and I still get the same message.

I have tried uninstalling the drivers and then re installing that did not work.

I have tried updating the drivers it said they were up to date.

They do NOT show up in "My Computer" were my internal and external drive is located.

I know the USB ports on my PC are working properly because I have tried plugging in other things. (iPhone)

They show up in Device Manager, but they show up as "Unknown Device"

I have tried the unplugging the PC trick to reset the motherboard (which did work for a similar problem, but not for this)

I have tried troubleshooting the problem by going to Device and Printers and right-clicking on troubleshoot which did nothing except tell me there was a problem. (Which I already know already obviously)

I have searched online for the past 3-4 hours now, and found nothing. Just to be clear. The most common response to a problem like this was to go right-click on "Computer" and then click "Manage" then going to "Storage" then "Disk Management" and assigning, or changing the drive letter. I can not do that because my USB's are not even shown in Disk Manager which apparently is rare because I found almost nobody with that problem let alone an answer to it.

These USB's I don't think have any data on them at all, but if they do it is not important to me if I lose it that would be fine I just want to be able to use my USB's again because I do not want to buy any more that's kind of ridiculous there has to be a fix. If anyone has any solutions I am willing to try anything at this point. Any help at all would be more then appreciated.
Thanks!