Hi, my name is ***** ***** I'll be helping you today.
I'm certain its not a Windows 10 issue, and it's been a while since I've touched version 7, so bear with me while I find the solution. I'm pretty sure it's defined by the type of image that you are working with, but give me a little bit to verify.
See if this does the trick:
1. Open the Preferences dialog window
On the mac, this will be found under the main Photoshop menu. On Windows computers, it will be found under the Edit menu.
2. Select Units & Rulers3. Change Rulers units to pixels (or whatever you wish)4. Click OK button to save your preference.
Please reply back with the results.