just bought WaveLab Elements 8 downloaded can't findon comp

Thanks

Operating system is Windows 8
64bit
there is a setup64 icon that I hit but the comp says I haven’t enough disk space, but I have 2 and a half tbs worth, so not sure what that’s about.

It says
Insufficiant free disk space

then says

cannot prepare main package
Probably corrupted package, incorrect TMP/TEMP variables or there is
no execute permission for temporary folder