[Konspiracy]

Hello everyone, I am desparate for an answer to my hardware problem.

I use Windows XP & a few weeks ago I unistalled a few items to free up some space on my computer.

Since that time I cannot install my digital camera for photos, card reader, or even a memory stick via the usb points at the back of my computer. (which usually shows as my 'F drive' on my computer.

Every time I try to install or use the usb point I get the message 'Found new hardware - cannot install this hardware. There was a problem installing this hardware.
USB Mass Storage (then 3 pronged pic) An error occured during installation of device. The data is invalid. Click finish to close wizard.'

I am desparate to find an answer as my wife needs to use these items for work. Any ideas on how to resolve this problem?
Regards
Konspiracy