Why can i only download bad files ?

[Limbabnees]

Hi, i hope someone can help me here.
I'm not sure if i post it in the wright topic, sory for that.

Im not able to download normal files, all files i select are corrupt.
No MP3 available, not visible.
I deinstalled & reinstalled it several times by now. Problem keep coming back.

Just did a scan with PSPitstop Exterminate and he found this:

2 x Difisim "Trojan:
http://www3.ca.com/securityadvisor/p...x?id=453102058

1 x Grokster "P2P"
http://www3.ca.com/securityadvisor/p...x?id=453060425

1 x KaZaA "P2P"
http://www3.ca.com/securityadvisor/p...x?id=453060292

P.s. i clicked this link and Sygate blocked a "port attack"
See Also: http://www3.ca.com/securityadvisor/s...&allwords=true

4 X Limewire "P2P"
http://www3.ca.com/securityadvisor/p...x?id=453088059

Does someone know if i are in big trouble?

Thanks.