[sanitys]

to be honest its not that hard to embed a exe file into a .jpg file, now most anti virus will detect it, but the whatever.jpg.exe really isnt used much compared to just embedding the virus into whatever image you want. general rule of thumb, dont open emails from people you dont know, and on top of that programs such as MS outlook even ask you if you wish to view the images/html, its just way to easy to embed stuff without people knowing it.

the best virus protection, dont open random emails, dont goto random porn sites, use something like ccleaner, or spy bot or whatever you perfer, and use a good small foot print anti-virus, i personally use ccleaner in conjuction with syanmtec anti-viruse corp. edition. Never had any issues with virus/spy/ad/whatever the case may be.