Spybot - Search & Destroy has been in the antispyware game for a long time offering features we've come to expect in the best apps in the category, but bugs and false positives make it difficult to recommend.
The program checks your system against a comprehensive database of adware and other system invaders. It also features several interface improvements, including multiple skins for dressing up its appearance. Scan results now appear arranged by groups in a tree, and a sliding panel lets you instantly view information about a selected item to help you decide whether to kill it or not. The Immunize feature blocks a plethora of uninvited Web-borne flotsam before it reaches your computer. Other useful tools, including Secure Shredder, complement the program's basic functionality for completely destroying files. Hosts File blocks adware servers from your computer, and System Startup lets you review which apps load when you start your computer.

Unfortunately, the program has the tendency to lock up at times and even during the install process for this review, we encountered several errors. The ambitious feature list and functionality make Spybot a good choice for those in search of a second antispyware program, and recent updates have made it run faster. It still makes errors in flagging spyware that isn't, and overall there are others in the category that do a better job.

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* Reviewed by: CNET Staff
* Version reviewed: Spybot - Search & Destroy 1.6.2

This impressive software provides the same steadfast protection of well-known antivirus programs, yet it's surprisingly free.

Avast Home Edition guards your PC and the network with multiple shields that scan executables and files. You can select parameters for scanning, and even choose wildcards to exclude specific file types. You can adjust the sensitivity level for the program's detectors when it comes to scanning downloaded files, instant messages, e-mails, and a host of P2Ps. Its efficient interface opens up window after window to tweak its settings to your liking, for novice to advanced level protection.

Though it took quite some time to run, we're impressed with this application's boot-time antivirus scan. Fortunately, if you're in a pinch you can bypass it. If malicious contents are detected, Avast comes to the rescue with handy virus cleanup tools. Some decent PC controls are even handed out here. You can block certain URLs and file operations, such as writing to files or even renaming, deleting or formatting them.

With immediate real-time protection, clockwork updates, and much more, this free software is highly regarded in our book.

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* Reviewed by: CNET Staff
* Version reviewed: Avast Home Edition 4.8.1335.90416

This antivirus program offers rock-solid protection. AVG Free provides the bare necessities, including a real-time shield to prevent infections, anti-virus and anti-malware wrapped up in one engine, and a link scanner for Web surfing with care.

By default, the application is set to search for new virus definitions daily, but you always can use the scheduling tool to change this. Should a virus create serious system problems, AVG creates a rescue disk to scan your computer in MS-DOS mode. The program doesn't tax your system when scanning or when running in the background and always proved effective in our tests. The new interface is much easier to navigate than in previous version, with tabbed navigation on the left assisting users in drilling down to the tools they need.

Though the free version of this program will suffice for average folks, those who demand more control should certainly consider AVG Anti-Virus Professional.

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* Reviewed by: Seth Rosenblatt (Download.com editor)
* Reviewed on: November 9, 2008
* Version reviewed: AVG Anti-Virus Free Edition 8.5.374

Consistently at or near the top of independent efficacy testers, Avira's AntiVir remains one of the best freeware security solutions around. Its scans are flexible, allowing the user to fully scan both internal and external hard drives, run a preloaded scan--for rootkits, for example--or customize a scan. The latest version introduces antispyware protections, scanning tech that can crack open "locked" files, improved internal security to prevent AntiVir's files from being maliciously altered, and one-click threat removal--no more baby-sitting.

There are few interface changes in version 9, and older users are not likely notice anything different in the interface besides a refreshed banner logo. The main window offers a left side navigation with drop-down menus and a central pane for more detailed information. AntiVir opens to the Status menu, informing you of your last scan, your last definition file update, whether the real-time guard is active, and premium upgrade link. Events logs changes to the program and the Reports tab keeps a history of threats. Both are exportable.

The Local Protection and Administration navigation options reveal the Scanner, Guard, Quarantine, and Scheduler features. Combined with the Configuration button located at the top of the central pane, users can customize their scans as necessary. Quarantined file information is on display, with options to scan it again, restore, delete, and e-mail the file to Avira. The rebuilt heuristic engine retains the same choices from the previous version's, and can be turned on or off in part or in full and offers three intensity levels. The scheduler offers much that other free antivirus programs don't, and the help features are excellent, with mouse-over information on each feature.

Savvy users will notice the removal of the on-demand e-mail scan, and AntiVir is still challenging to fully uninstall. Despite these hang-ups and the nag screen that follows definition file updates, AntiVir offers such effective protection and a well-rounded set of features that as long as the updates keep coming, it'll be our first line of defense.

Download here (30.8MB)


* Reviewed by: Seth Rosenblatt (Download.com editor)
* Reviewed on: March 17, 2009
* Version reviewed: Avira AntiVir Personal - Free Antivirus 9.0.0.403

Malwarebytes Anti-Malware is a surprisingly effective freeware antimalware tool. It's a relatively speedy malware remover, with the quick scan taking about 8 minutes even with other high-resource programs running. The heuristics engine proved on multiple computers during empirical testing that it was capable of determining the difference between false positives and dangerous apps.

The app has some nice features rolled in, too. It supports multiple drive scanning including networked drives, context menu options including a scan-on-demand for individual files, and the FileAssassin option under the More Tools section for removing locked files. The interface is simple, but pleasant-looking and well-organized. Tabs live just below the oversized logo, with few options per tab to keep down the clutter. The installation process was fast enough, but interestingly offered up the well-kept changelog and an instant definition file update.

Do note that the real-time protection is restricted to the paid version, as is the scheduler for updates and scans. Overall, though, Malwarebytes Anti-Malware is a responsive malware remover that does what it should with a minimum of fuss.

Download here (3.4MB)


* Reviewed by: Seth Rosenblatt (Download.com editor)
* Reviewed on: February 11, 2009
* Version reviewed: Malwarebytes Anti-Malware 1.38

One of the first applications built to find and remove adware and spyware, Ad-Aware's excellent reputation is well-justified. The Anniversary Edition continues the publisher's tradition of adroitly addressing user concerns, but is still not quite perfect.

Without a doubt, though, this version of Ad-Aware improves greatly on what has come before. It loads faster during your boot cycle. Scans take less time than before, too--the Quick Scan completed in less than 10 minutes. Although we did notice a major false positive crop up for another program's uninstaller, there were no other flaws in the scan. New users should notice that the app performs faster than integrated antivirus and antimalware programs, because only the paid version of Ad-Aware comes with an antivirus engine.

Some important features are disabled in the free version. While rootkit detection is present, heuristics and real-time registry protection are not. Ad-Aware Free cannot scan networked drives, and even a basic feature like the scheduler remains off-limits to nonpaying customers. The proprietary real-time defender Ad-Watch Live has been reconfigured to run more smoothly in the background, however, and long-time fans will notice the change.

Interface refinements make this the easiest-to-use Ad-Aware yet. Action button placement at the bottom of the pane might feel odd to those familiar with older versions, but the forced continuity between windows is a plus. Links to drill down to more information are easy to see, as is the Settings button. Overall, Ad-Aware continues to make improvements and seems to be unwilling to rest on its malware-removing laurels, but the free version is undeniably hamstrung.

Download here (35.72MB)

* Reviewed by: Seth Rosenblatt (Download.com)
* Reviewed on: January 19, 2009
* Version reviewed: Ad-Aware Anniversary Edition 8.0