Windows 7 64 bit

Just recently I noticed it acting up in a unusual way =(

 

I uninstalled programs I no longer need to free up space.

 

I have about 450 GB left on my C drive and I also have an external usb hard drive with about 600 GB left.

Has any experienced this issue yet? If so any fixes?

 

Also what computer or hardware should I get to run programs like poser or 3ds max, maya, after effects, vue?