You are running Photoshop on old Core 2 Duo computers with 4GB of RAM and 80GB hard drives. Odds are, you will have problems as these are right at the minimum requirements, especially under Windows 10. I realize edu budgets are a problem, but upgrading the RAM and hard drives will really help. A bunch of, say, 160GB SSD's would be a HUGE help, and 8GB of RAM is a lot more realistic. You also want to update Photoshop as there is a known memory bug that was fixed recently.
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