One of the biggest risks to your online security is having unpatched programs. Keeping all your software up to date is no simple task, but Secunia’s Personal Software Inspector (PSI) makes it much easier to keep your Windows PC fully patched.
Secunia scans your computer for out-of-date programs and prompts you to perform updates. The autoupdate feature doesn’t always work perfectly, but knowing which of the many programs you’ve installed are out of date is half the battle.
Best of all, Secunia PSI is free for personal use.