usb hdd exponetial decline

hocuspocus

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so i have this usb hdd and it works fine on every computer except my win7 machine. with a 20gb file its starts off normal at 40+mB/s for the first 30s and then declines to about 6mB/s.

can anyone tell me what is happening here? this is a fresh install of win7 unltimate. only firefox is installed.
 

My Computer My Computer

At a glance

win7 Ultimate x64e66004GB8800gt
OS
win7 Ultimate x64
CPU
e6600
Motherboard
abit awd9 max
Memory
4GB
Graphics Card(s)
8800gt
Sound Card
realtek HD
Hard Drives
raid 0
PSU
antec
so i have this usb hdd and it works fine on every computer except my win7 machine. with a 20gb file its starts off normal at 40+mB/s for the first 30s and then declines to about 6mB/s.

can anyone tell me what is happening here? this is a fresh install of win7 unltimate. only firefox is installed.

Are you by chance running "HOMEGROUP". On some systems homegroup can have exactly that kind of transfer slow down.


Ken
 

My Computer My Computer

At a glance

Win 8 Release candidate 8400[email protected]4 gigsNvidia 9600M
Computer Manufacturer/Model Number
HP Pavillion dv-7 1005 Tx
OS
Win 8 Release candidate 8400
CPU
[email protected]
Memory
4 gigs
Graphics Card(s)
Nvidia 9600M
Sound Card
HD built-in
Monitor(s) Displays
17" Wxga
Screen Resolution
1440x900
Cooling
none
Internet Speed
45Mb down 5Mb up
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