Have you been tried editing natively? What problem are you trying to solve?
Just edit your 60D natively on your PC and you will be just fine: no transcoding before import needed.
On Adobe Media Encoder I go to Quicktime>Video Coded but I dont see ProRes. On my Mac I see it. But not on my PC.
You can't encode to ProRes on a PC other than via quite expensive solution from Telestrim or ffmpeg, which utilises reverse engineered ProRes encoder.
Would uncompressing h.264 video from my Canon 60D to ProRes 422 help?
That does depend on which sort of help you're looking for.
Transcoding to a production codec doesn't yield better quality. See these two The Video Road blogposts: Color Subsampling, or What is 4:4:4 or 4:2:2?? and Understanding Color Processing: 8-bit, 10-bit, 32-bit, and more.
However, transcoding to a production codec results in less CPU load on decoding and hence provides savings on time in e.g. compositing workflow or smoother playback on a not quite powerful machine (yes, it is CPU, not GPU matters here).