photoshop wont open

Hi

Never mind Photoshop with only 1.5GB of free space on the C drive you're going to run into issues on an operating system level, you need to free up space on the C drive pretty quickly

https://www.howtogeek.com/324956/how-much-free-space-should-you-leave-on-your-windows-pc/

Please read this article https://helpx.adobe.com/photoshop/using/scratch-disks-preferences.html#:~:text=Choose%20Edit%20%3E%20Preferences%20%3E%20Scratch%20Disks,Click%20OK.

You need more space, 1,5 GB is not enough I think.