Problems installing Metatrader! Where are the geniuses?

[Forex Trader]

Several months ago, I had no problems installing the software into my work work computer. I have just updated to a faster computer, t's a hp compaq pentium 4. However, when I attempt to dowdload, as the exe file is being executed, installation is haulted with this "cannot install file alert.wav" error message.
What can I do to install the software in my new work computer?
ANY and ALL help is appreciated. Thank you.