Honestly, I've seen this problem numerous times with so many different programs including games like the original
Sims. First thing's first though...
Anyway, first things first(I don't mean to yell but...), WHY THE HECK ARE YOU INSTALLING SOMETHING ON YOUR CORE DRIVE?!
Wrong. I always install stuff on my core drive, 1). because it's a laptop, 2). It's 100 GB, and 3). There is and has
never been anything wrong with installing stuff on your core drive. The immense slowdown is because of all the registry readings and the startup protocols involved with opening those files, not necessarily where they're located. It's true that filling up your C: drive to the brim can completely wreck your performance, but if there's at least 1 or 2 GB left of space to toy around with, it's fine.
Kasawa, I'll tell you right now that's simply
not the source of the problem. Notice in the Error field, it mentions a Cyclic Redundancy Check. A CRC is a little value attached to a file to determine what data it has, used normally to figure out whether a file is damaged or not. If the value changes from the original reading, then the computer knows the data is corrupted, and prevents the installation from continuing.
So it's either the disc or the drive that's wrecked. One of them is either broken or simply isn't clean. You're probably gonna need to buy (hah! who BUYS stuff these days) a new copy of whatever program you decide to use. Go get a more updated version of that program while you're at it... Photoshop CS is
ancient.