Urgent Help needed!

[Crossy]

hey there, ive just complete my first build and it installed windows without a hickup. But when i download a file like Teamspeak and MSN messenger it tells me the files are corrupt and they will just cancel the download. My specs are as followed.

AMD athlon 3500
ASUS A8n SLI SE
512 PC3200 (out of my dell)
MSI 7900GTX

Thanks for any help!!!!

 

[Crossy]

memtest? how do i do that?

 

[Crossy]

ive managed to install msn, but ventrilo and Teamspeak are still "corrupted"


EDIT:: could the problem be that i dont have SP2 installed?