Why i need to download driver for USB drive?

[rupak]

Hi,
i have a flash drive & when i connect it o my laptop it works fine for the first time but the exact thing i want to use again it asks me to install driver for the device I don't know why i need to download the USB driver from the laptop manufacturer? I have windows XP install & i think USB drive must work as a plug & play. Any Idea?

[Halloween]

You are right you don't need to download USB drivers in windows XP.
Is it just asking for the device driver only or you get any error message too?

[rupak]

Yes further after downloading the driver, installing & all I get a message saying the data is invalid! I don't understand the same data was valid for the first time & now its invalid!
Is there any virus in my system?

[Musrat]

Well it may be possible that any virus is there. I would suggest you to scan your system with a better antivirus! Se if the problem is still there!