Secunia Security Inspector helps you keep up with software updates. Not keeping up creates vulnerabilities that hackers are only too eager to exploit, so why not give this free online application a try?
NOTE: You can run a check of software often in need of updating via your browser while online without needing to download or install anything, or you can download and install a free inspector (for individuals-- business version is not free) and do a really thorough check of your system.
You should always right-click downloaded files before opening (never left-click first)-- you can then scan with your security software to be sure that no viruses, malware, or spyware are present. Better safe than sorry!