How do i scan on HP LaserJet M3035 MFP from computer?

Assuming your scanner is installed already, what you need to do is log into Windows Photo Gallery (Vista) and click on FILE at the top left. When the drop down bar engages, you should look for IMPORT FROM CAMERA OR SCANNER and click it. Then a new window will open up and you'll have to pick your device (HP Laserjet M3035). At this point check your settings, and make sure your scan is ready, then click on either PREVIEW or SCAN. Then when it is done scanning, you will have to go to the folder you saved it in to view it. (Xp Similar)

Hope this helps.