Lags in CorelDraw 2017

Processor Intel Xeon W3670 3.2 GHz

12 gig ram memory

64 bit windows 10

i read that CD 2017 is optimized for windows 10 but i have found there are some pretty major lags.  Especially notable is the resizing of objects: Example: choose two objects and hold down the shift key to keep the sizing proportional -- the redraw is so slow that you cannot practically see how large or small the results will be unless you wait 5 seconds or more.  Of course, it is worse if you have 25 objects selected.

i include my computer info above realizing that my machine is about 4 years old and that may be a factor.

Thoughts?

-handsome john