@Star1000120 The main issue of having to reinstall Showtime indicates system issues. The first thing I see is the present graphics chip is not supported by the game. The Intel HD Graphics 2500 (which is on the same chip as the I5) is not below minimum requirement The 64Mb dedicated video memory is below the minimum requirement. There is a PCIe X16 slot for a video card but the power supply is only rated at 320W which is low for most of today's video cards. I have questions as to why the Hitachi drive was partitioned the way it is. The fact that Windows 7 main support is over and now on extended support does not help the value of your computer. I feel just upgrading the video may not solve the problem and would not add value to the computer. That model was meant as a business model more then a consumer model. Business computers usually make poor gaming computers. Any repair will probably exceed the value of your computer in its present form.
I'm guessing someone put a new system hard drive in and moved the existing system drive to a secondary drive which may indicate issues on the original system drive. I'm guessing the 320W power supply may be failing and that could explain some of the issues (if not all the issues). With issues as you describe, your computer does not meet minimum requirements, and the low value I can only recommend a new (or newer) consumer computer.