You're using a self-signed ssl cert, these are not considered "safe" by the majority of browsers and so they will issue a warning. If you're not just testing you should get a cert from a trusted certificate authority.
Your buttons for the help desk section have too little contrast. This reduces ledgability and comes off as a button that is "inactive" or not "clickable" as low contrast, usually gray, buttons are the standard for non-usable site content.
When i click "order now" i am present with a page that is too busy. If i have clicked that button i more than likely am interested and will become a conversion... unless i get distracted. An order now page should have a clear call to action and should not be cluttered with anything else that is not relevant/absolutely needed to complete the process. If you want them to order, why are you tempting them with so much distracting content that may make and allow them to exit the page? Even worse you offer them an escape from your site entirely, like the trend micro blog.
The Faq's has misspelled words/typo's.
Your SEO needs work. As an example, your home page is optimized for "tech team"... with a little searching i do see this phrase is searched a fair amount, however you have 166,000,000 results to compete against for ranking on google! Even worse, 1,150,000,000 to compete against on yahoo! Better optimization for niche keywords and phrases is your best bet. Your meta tags also appear static.
You main call to action image at the right of the home page is jaggy on the edge, i assume because its using png 1 bit transparency. If you're using full 8 bit transparency you should smooth it out some, even so, eitherway there is no need for the white outline i see. However, you need to take care that you're using png transparency right, there has been iffy support for png transparency in IE. Use your install of google analytics to see what versions your visitors are using.
If you're in it for the business you should take care of having so many links that link to other sites entirely. If a link links to something that has no possible loopback to your site and/or service those links are basically exit signs.
Hope that helps,