Snaps not working at all on and off, Mouse pointer "staggering" on screen, slow reaction to selection

Hi everybody, I have few issues with Draftsight and would like to know is this is the software or my setup.

1) Slow reaction on screen, pointer "staggers" (hope i spell that one right), it looks like if i have the "grid to snap" setting on, but i don't, is just the pointer is so slow to react, it moves but you can tell is staggering along the screen.

2) This one is weird, Snaps stops working for no reason, have to close Draftsight and re open the program and sometimes works, sometimes don't work at all, not sure if related but I installed other CAD applications that I'm testing to move away from AutoCAD and I wonder if installing and uninstalling other CAD applications can affect Draftsight.

 

My system:

Win 8.1, 64Bits

8.0 GB

Inboard Graphics, HD 4000

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In my system i'm running Geomagic Pro (used to be Alibre) mechanical and runs fine.

I'm also using GstarCAD and runs just fine 

Rhino 3D no problems

I might get some graphic glitches but nothing that crashes or slow my applications, in general all run fine.

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System at work for test:

Win 7, 32 Bits

3.0 GB

Nvidia GT 240

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I use Rhino 3D, running perfect.

Tried few CAD applications all worked fine.

Thank you