|Ok, that is an Ancestry.com coding problem.|
You can play around in here to get the best out of your comp as far as memory usage goes, I personally use these settings, but it depends on you own requirements, mine are very basic.
Right-click "My Computer", then "Properties".
Choose the "Advanced" tab. Under "Performance" click "Settings".
In Visual Effects, click on Custom & untick everything, except these 2 > Smooth edges of screen fonts & Use visual styles on windows and buttons ( Default has everything ticked, except > Smooth edges of screen fonts )
Click Apply & then OK.
Processor scheduling & Memory usage, select Programs for both.
Virtual Memory > Change
I use > System managed size
Just in case you need extra genealogy programs, here are more.
3 pages Freeware