There are several problems with your current PC:
1) The base clock speed is too low: Regardless of the number of CPU cores, you can't do much with a CPU that runs at only 2.0 GHz.
2) Your system's GPU is lousy by current standards: The K2000 is based on a lower-clocked version of the old GeForce GTX 650, with even less memory throughput than the GTX 650 – 64 GB/second versus 80 GB/second.
3) Your PC appears to have only a single disk for absolutely everything – and it is not even 7200 RPM hard drive, let alone a SATA SSD. All WD Green hard drives spin at only 5405 RPM, and the 500 GB model can't sustain even 100 MB/second in sequential read or writes. You will definitely need to add two additional internal disks to your PC.
I think you are right about cpu and hdd but this gpu is recommended by adobe.
The trouble with those GPU "recommendations" is that Adobe did not test for performance - but instead compatibility - to begin with.
Second, Adobe could not test every single GPU on the market even for that due to limited hardware testing resources.
Third, Adobe has not updated its list of "recommended" GPUs for quite some time.
Thus, if a newer, faster GPU isn't listed on Adobe's recommended list, it almost always means that Adobe has not yet tested that particular GPU. But it should work and perform well if it meets or exceeds all other hardware requirements (1GB or more VRAM, 384 or more CUDA cores for CC 2017).