Kaspersky AntiVirus 2011 Download:

Kaspersky Antivirus 2011 VERSION:  Windows 7 / Vista / XP, Single User

PRICE:  $39.95

Note: This is an old version of Kaspersky.

Current Kaspersky software:
Kaspersky Antivirus 2015
Kaspersky Internet Security 2015

Information Below:  Review, Screenshots, System Requirements

Review of Kaspersky AntiVirus 2011:

    By Jay Andrew Allen

KasperskyGoodWhen people talk about Antivirus applications, "Kaspersky" isn't usually one of the first names to roll off of their tongues. But this stalwart, known colloquially as KAV, has been drawing accolades since 2007 for its fast scan times, and high virus detection rates. Unfortunately, our benchmarks found that KAV 2011 lags behind other major antivirus programs in key performance metrics.

1) Installation:  4/5

Kaspersky AntiVirus 2011 installed in 1 minute and 52 seconds on our reference computer*. The installation was a typical Windows MSI package that produces multiple user prompts, making it less of a worry-free install than some of its competitors. (See Installation Time Comparison Graph)

If you've downloaded an older trial version of Kaspersky off of a site like, Kaspersky will ask if you wish to download and install the latest version instead - a handy feature that ensures you're obtaining the latest Kaspersky technology immediately. This will, however, significantly increase your installation time, as Kaspersky downloads the latest installer in full, as opposed to downloading an update or a patch.

*Reference Computer: Windows 7 Home Premium running on a Toshiba Pentium Dual-Core T4200, with 3GB of RAM and a 210GB hard drive.

2) Features & Ease of Use:  8.5/10

Like most antivirus programs, Kaspersky runs silently in the background if you leave it alone with default settings. The Kaspersky AntiVirus 2011 Dashboard provides a running tally of the latest background scans in its lower-right corner. A large icon at the top of the Dashboard gives your current virus scanning status, and indicates whether there are any active threats.

Kaspersky 2011 Dashboard:

View Larger Kaspersky Screenshots

Kaspersky aims to protect its users from a wide range of malware and adware. Its Proactive Defense feature scans for "zero day defect" viruses that are not yet listed in the virus definition database. Kaspersky contains some interesting add-on tools, such as a virus-aware System Restore. The best tool in its bag of tricks is the Vulnerability Scan, which examines your computer for known security holes in installed applications that may be exploited by malicious computer code. By finding these vulnerabilities pro-actively, Kaspersky helps you eliminate security holes before a malware application attempts to exploit them. Sadly, this feature doesn't appear fully baked: clicking on a reported vulnerable application's Details button results in a "404 Not Found" error on the site

Kaspersky Tools:

View Larger Kaspersky Screenshots

New Features:

    • Desktop Security Gadget - allows quick access from your desktop to protection status and settings

3) Virus Scanner:  3/5

On a Windows 7 computer, Kaspersky scans at a pace of 26.1 MB per second - scanning our 1.0GB test files in 39.3 seconds. This was the 9th fastest antivirus program we tested this year - right in the middle of the pack (15 total programs), but less than half the scanning speed of top-rated NOD32 Antivirus. (See Scan Speed Comparison Graph)

Kaspersky Virus Scanner:

View Larger Kaspersky Screenshots

One nice touch with Kaspersky's virus scanner is its new drag and drop scanning feature - which lets you click on any file and "drag" it to be quickly scanned by Kaspersky. This is especially nice if you have one or two files that seem suspicious.

It was disappointing to see that the Kaspersky virus definition database was still two and a half months out of date about half an hour after installation. Why this wasn't updated immediately after install is a mystery. In general, Kaspersky only updates itself an average of 6.7 times per day - far less than the industry leader Norton AntiVirus, which clocks an average of over 200 updates over the same period. (See Updates Per Day Comparison Graph)

4) Performance Testing:  5/10

Memory Use: Kaspersky 2011 uses 20.3 MB of memory. #7 ranked program of the 15 Antivirus programs tested.

Reboot Time: Kaspersky added 22.9 seconds to our test computer's reboot time. #12 ranked program.

Installation Size: Kaspersky Antivirus 2011 takes 641 MB of hard-drive space for installation. #14 ranked program.

Initial Scan Speed: Kaspersky scans files the first time at a speed of 26.1 MB/s. #9 ranked program.

Subsequent Scan Speed: Kaspersky performs subsequent scans at a speed of 213.3 MB/s. #3 ranked program.

Initial Application Launch: Kaspersky added 0.761s to launch a web browser for the first time after a reboot. #10 ranked program.

Subsequent Application Launch: Kaspersky added 0.417s on average for subsequent web browser launches. #13 ranked program.

File Conversion Time: Kaspersky added only 0.38s on average to convert a MP3 file to four other file types. #5 ranked program.

System Impact Score: The "System Impact Score" is a comparative score tallied from the above 8 Antivirus tests. Kaspersky 2011 only scored a total of 55 out of 120 points when compared to the other Antivirus programs. This placed Kaspersky 10th overall - quite the fall from Kaspersky's 5th place finish last year. Definitely a disappointing set of results for a program once known for its speedy performance.

View graphs of the above Antivirus Performance Tests.

5) Effectiveness: (Virus/Malware Detection)  12.5/15


6) Help & Support:  3/5

Kaspersky's Help & Support options are a mixed bag. The Help section is very thorough, but many of the topics sound stilted and wooden.

The Support link at the bottom of the Dashboard was frustrating. One of the links (KnowledgeBase) results in a "404 Not Found" error. Also, there is no obvious way to contact a Kaspersky support professional directly from the interface. Kaspersky's Support options all point to online resources, such as its FastTrack interactive knowledgebase and its user forums. (Hint: You have to click on My Kaspersky Account - you can then log a new support ticket with Kaspersky from your online dashboard.) What makes this even more frustrating is that Kaspersky offers Live Chat support - but you have to dig through their Support website to find the link.


GoodFor the last 2 years we've seen each successive version of Kaspersky get slightly worse than its predecessor. Kaspersky AntiVirus 2011 continues this trend as this year's version has some major Performance issues that our Antivirus Testing found. Kaspersky is a shadow of its former self when it was one of the best performing antivirus programs on the market just 5 years ago - now it's near the bottom. If Kaspersky doesn't address these issues soon, we may stop recommending it. But for now Kaspersky still is one of the better antivirus programs available, so if you have a good enough computer that can handle Kaspersky's performance shortcomings then carry on with Kaspersky. Otherwise, read our other Antivirus Software Reviews for a less obtrusive alternative.

Overall Rating: Good    (Total Score: 36 / 50 = 3.5 Stars)

Misc Info:

    • Version Tested:
    • Release Date:
    • Review Date:
    • Last Updated:
April 13, 2011
    • Previous Versions:
Kaspersky AntiVirus 2010, Kaspersky AntiVirus 2009

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Kaspersky Antivirus 2011 Screenshots

View Screenshots

*See Screenshots of Kaspersky AntiVirus 2015

Kaspersky Antivirus 2011 System Requirements:

Supported Operating Systems:

    • Windows 7: Starter / Home Basic / Home Premium / Professional / Ultimate (32-bit & 64-bit versions)
    • Windows Vista: Home Basic / Home Premium / Business / Ultimate / Enterprise Editions (32 bit & 64 bit)
    • Microsoft Windows XP: Home Edition / Professional / Pro 64-bit (Service Pack 2 or higher)

Minimum Requirements:

    • 1 GHz or better processor, 1 GB RAM (32-bit) or 2 GB RAM (64-bit)
    • 650 MB available hard-drive space
    • CD-ROM or DVD drive (if not installing via Download)
    • Microsoft Internet Explorer 6 or higher (for updates)

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