Download file problem

Hello all, I have a problem since I downloaded zone alarm from this site.
I have windows xp home sp2 installed I.E.6 Dell dimension 2300
When I downloaded the above I could not install. I lost the original message so I tried another -aida32ee_393.zip this is the message i Got - C:\Documents and settings\owner\Local Settings\Temporary Internet files\Content.ie5\ff6juliz aida32ee_(1) aida32.exe is not a valid win32 application. It now seems that I can't download anything . I have tried looking in microsoft KB but had no luck. Being a glutton for punishment I tried to download zone alarm again just now and got this- unable to execute file in the temporary directorry. Setup aborted Error 193: %1 is not a valid win32 application. Tried again and got an error occured while launching the setup (0x80040702) microsoft Knowlege Base does not know this number. I will be greatful if anyone can help me out. Thanks for any help you may be able to give this newby. Cheers rab