Anti-virus:

avast!

AVG free

Avira Antivir

Antispyware etc:

ad-ware __(FREE)

Spybot - Search & Destroy __(FREE)

AVG Antispyware (formerly Ewido)

I'm sure that lots of people try to download Pro off the network. Whether they get a good, clean version of Pro is another matter
Why would anyone be so ch_eap, anyway? LW Pro's a great app & the small payment for Pro goes towards the future development of LW.

Personally, I think anyone who tries to download Pro from the network deserves to get a useless, malware infested piece of crap that won't download a single file