Trouble uninstalling software and installing Malwarebytes

I'm trying to follow the cleaning instructions for XP.

In the first few steps, when trying to uninstall unnecessary software,
I am having trouble uninstalling Zuma Deluxe--a game my brother downloaded,
and Happy Holidays--something mom downloading, and its supposed to be a
screen saver thing.

But when I go to remove Zuma Deluxe a message pops up:
"Exception EInvalidOp in module msvcrt.dll at 000412F1.
Invalid floating point version."

When attempting to uninstall Happy Holidays:
"Exception EinvalidOp in module _iu14D2N.tmp at 77850179.
Invalid floating point operation."

Then, when trying to install Malwarebytes Anti-Spyware 1.32 a message pops up saying:
"Exception EInvalidOp in module mb.tmp at 778500D5.
Invalid floating point operation."

What do you suggest I do?

Thanks in advance...