Removable Storage Problems

Hey guys, I'm having a bit of a problem here which is driving me INSANE.

All of my Removable Storage Devices (Flash drives, External HDD) do not work with my Windows 7. When I connect them, I hear the beeps but the device sometimes show up, sometimes not and sometimes they appear after a long interval. On accessing them, Windows tell me that I need to format the drive. Well, I can't do that.

Any ideas? It's happening with all of my removable devices, not just one. They work fine with my laptop which is Windows 7 too, so I guess it's my computer's problem? Any fix? Halp?

Someone? Please.

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