I just got windows 10 and I'm having trouble scanning a pictures - I have an HP 3-1 printer and I could scan always before
We generally don't troubleshoot peripherals.
If you updated your computer to Win10 you may need to install new drivers for your HP printer. Check their website for updated drivers. If you got a new computer with Win10 you probably need to install the scanning software for your HP printer. Check their website for updated scanning software.