PC won't recognize USB Flash

I have a 2 M USB flash drive and it used to work great. Just plug it in to any USB port, it shows up as F: Drive, and I'd download / upload what ever I want.

Now when I plug it in, my PC doesn't recognize it as F: drive and I can't access it. The icon to safely remove it appears in my taskbar. In Device Manager it appears as a Generic USB Flash Disc.

I went to Computer Manager and it showed up as Removable Disc 0. I replaced it with the new Drive Letter F:. It shows as Healthy Fat 32 drive. If I right click on it, I can open the files that are on there, but this is the only way I can access them. If I go to My Computer, it still doesn't show up as F: Drive.

How can I get it to go back to being recognized as F: Drive in MY Computer?

Thank you.