Cannot click and drag in Photoshop
I'm using Photoshop CC2018 on a Windows Surface Book 2 and I'm unable to click and drag using the touchpad or an external mouse. If I use the paintbrush it registers the initial click and then ignores the drag. I'm also unable to click and hold on a tool in the tools panel to select alternate tools (ie I cannot hold down the brush tool to access the pencil.) I can, however, use the Windows Pen to click and drag using the paintbrush tool but it still won't allow me to use other tools like the Rectangular Marquee.
Some key commands are also not functioning: holding alt on the magnifying glass does nothing, holding shift doesn't give me straight lines, etc. All of these features function perfectly in Illustrator and Indesign. All of my Adobe Programs are up to date and I recently downloaded all the available Windows updates. I've already tried resetting my tools and uninstalling and reinstalling Photoshop. I'm at a total loss so any recommendations would be greatly appreciated! !
