Zoo Tycoon 2, marine mania self-uninstalling; zookeeper won't inst

[PR]

Buy this for my son's birthday, get it working, then next day (daylight
Savings switch) not. After re-installing ZT2 & MM, son plays MM. After a
while, MM uninstalls itself and ZT2.

Also, click "install" button on Zookeeper Collection and it reads out
"uninstalling". Will not allow installation. tried setup manually and same.

Runnning XP, computer is couple years old, ZT2 had been working flawlessly
before with downloaded expansion packs. Had some trouble at first because
demos weren't removed, but uninstalling those allowed it to run Sat.

Any thoughts?
thanks

[Dana Sieben]

This just happened with our games as well. Same two. Last night, I installed
ZT2 Zookeeper Collection and Marine Mania and they worked fine. This morning,
neither would open.

I uninstalled ZT2 and then tried to re-install and it keeps uninstalling
even though I can't find the program on my hard drive.

What gives?

I called Microsoft and spoke with a techie. He recommended I update my video
graphics card. Did that and still not fixed.

Need help!