Download and run the Windows 7 Upgrade Advisor. It scans your hardware, devices, and installed programs for known compatibility issues, gives you guidance on how to resolve potential issues found, and recommends what to do before you upgrade. Download details: Windows 7 Upgrade Advisor
Windows 7 hardware requirements:
- 1 gigahertz (GHz) or faster processor
- 1 gigabyte (GB) RAM (32-bit) or 2 GB RAM (64-bit)
- 16 GB available hard disk space (32-bit) or 20 GB (64-bit)
- DirectX 9 graphics device with WDDM 1.0 or higher driver
However, if possible, upgrade your RAM to the maximum supported. That'll give you the biggest bang for the buck in terms of speed increase. With your current config, 70% RAM is being consumed with only a few apps open. So RAM is the bottleneck. You can also use Readyboost.