Hi
I got Windows 7, and I tried already the following things:
Scan Doctor (it said 'can't find the problem, go back to the homepage')
Different USB port
Different USB cable
Restart computer/turn off and on printer
Reinstall software
Checked for critical updates, patches, and firmware (none available)
Turned off programs that run in the background
The other suggestions like disk cleanup etc I'm not particularly keen on, especially as it all works fine on my boyfriend's laptop and he didn't have to do a cleanup...
Thanks!