pen drive unable 2 write after win 7 upgrade

I have a Kingston 4 GB usb pen drive,

I am able to store large files (>50MB) on computers running on xp.

However, pen drive unable to store large files (>50MB) on computer running windows 7.

No problem reading from usb, but when i write data on it , stops midway and usb drive disappears.

Have formatted drive with both fat32 and NTFS, scanned fo errors, scanned for viruses but no improvement.

Plz Help!!!!!!!!!!!
Configuration: Windows 7 Internet Explorer 8.0

Hi Jonathan,

We have checked our USB and chipset drivers in Device Manager and all are up-to-date.

Your assistance would be highly appreciated.

Regards
Carl

Thanks for your quick reply.

This Pen drive has worked with this system when I was running XP and VISTA.

I have recently upgraded my system to Window 7 after comprehensive hardware upgrade.

Unfortunately, I do not have any other USB pen drive. However, will try to obtain it from friends and will revert to you with the outcome.

Thanks once again for all the help.

Regards
Carl

Hello everybody and sorry for the necroposting. Did anyone solved this? I have 3 guesses
1) It's seven 64 bit
2) It's the AMD 7X0 chipset
3) 1 and 2 together

I can tell this after many try, i run a pc-repair store and i experienced this:
On a asrock mobo with nvidia chipset and w7 32 my 2 pendrives (kingston 16gb both) work fine. Instead, on two different pc both asus (a m4a77td pro and a m4a88t-v evo, so AMD 770 chipset and w64 installed on both) i can't write files bigger than 50Mb.
Is there a solution?