100% Security
Instant Download 24/7
10+ Years of Service
X
0 Reviews
$49.95
$139.99
Save 64%

Kaspersky Internet Security 2021 [10-D, 1-YR]

Includes a 10-device, 1-Year license

Offer Ends
+ login to earn points
Platform
Android
macOS
Windows 10
Windows 11
Windows 7 (32 bit)
Windows 7 (64 bit)
Windows 8
Version
2021
Manufacturer
Twitter
Last Updated
28 February 2026
Category
Download Size
162.00 MB

Kaspersky Internet Security 2021 is a powerful suite of malware-hunting, anti-hacker, web safety tools. 

There's antivirus. Browsing protection. A firewall. Exploit protection. A vulnerability scanner, parental controls, webcam and audio protection, online transaction protection, and more.

These features have real value, too. Independent testing labs such as AV-Comparatives typically rate Kaspersky as offering some of the best protection around.

There's the Software Updater, which checks for updates to common applications (Adobe Reader, Flash, Java, Chrome, Firefox, more), and can optionally install them without you having to see or do anything at all.

A "Secure Connection" feature is essentially a privacy-oriented VPN (virtual private network), automatically kicking in to protect you when using wifi hotspots, web banking sites and more.

An Installation Assistance tool looks out for adware and other pests that get silently installed with some "free" software, and the Software Cleaner helps you decide what to remove.

What's new in Kaspersky Internet Security 2021? Your computer is now protected whilst it's either booting or restarting, there's better protection against third-party manipulation of files on your hard drive, additional notifications to warn against potential malicious websites and, for any reseller, Kaspersky has made it much easier for a user to be able to add a new licence to an expired subscription rather than forcing the user to renew.

Includes a 10-Device, 1-Year license.

Review by Mike Williams.

Special Information

You'll receive your Kaspersky Internet Security 2021 license code, plus download instructions for all devices, after purchase. You can download other trial versions from the Kaspersky Internet Security 2021 website, here: http://support.kaspersky.com/#s_tab2

You receive a single license with Kaspersky Internet Security 2021. Your license can activate Kaspersky Internet Security 2021 (PC), Kaspersky Internet Security for Mac v21 and Kaspersky Internet Security for Android (Android). You can use your 5-Device license to activate either one of these applications, five times, for one year.

Performance Issues?

Most system performance issues are often a result of other software clashing with your brand new software. For instance, security software can clash with a background process, such as a system maintenance tool or defragmentation software. Another cause of system slowdown, is a result of two software applications performing a similar task. As an example, Windows includes a firewall switched on as a default. Your new security suite is likely to include a firewall. You only need one firewall running. In this example, try turning off your system firewall.

Uninstalling Your New Software

Occasionally you may need to either temporarily or permanently remove your new software.

On a Windows computer, go to the Control Panel and choose Programs and Features. Locate the program within the list, then click it to highlight it. Finally, click the Uninstall button at the top of the list and follow the instructions to remove the program from your PC.

On an Apple Mac computer, using Finder, locate the Applications folder. Within the Applications folder, find the name of the application you wish to remove. Simply drag the icon to your Trash icon in your dock. Empty the Trash to remove the files from your computer.

Still Having Problems?

If you cannot solve your system performance issues or are struggling to remove your software, we advise contacting the software manufacturer. If you placed an order, see the section in the order which states Support options. Alternatively, go to the Contact Us page to contact store support directly.

Similar Software

Frequently Asked Questions

Find quick answers to the most common questions about our services and platform

How Do I Order Software?
Simply select the software you want to order by clicking the "Buy Now" button or, where the option exists, clicking on "Upgrade". The upgrade option enables you to upgrade from a previous version of the software. When you click "Buy Now" you will be taken to your shopping cart, powered by Cleverbridge, where you can choose a payment option and then receive your download and serial code within seconds, after making your payment.
What Is The Extended Download Insurance?
When you order software online, you receive a digital download and a serial code by email. You normally have 30 days from placing the order to download your software, if you need to download again in the future. You can choose to extend this to two years, enabling you to login to your account and find your download, serial code(s) and your original invoice. Ideal if you need to re-install your software, suffer from a system crash or buy a new PC. Simply had to the "My Account" section on this store - or any one of our worldwide stores - to access previous orders.
Do I Need A Backup CD?
No, although some people like to receive a copy of their software on a CD which they can store indefinitely. We provide a backup CD for some applications in the store. For example, we can provide an official colour booklet and installation/backup CD for AVG and Kaspersky software ordered through the store. Some software suppliers, such as Nitro PDF and Paragon Software, will supply you directly with a backup CD if you include this with your order.
Why Are Some Prices Dynamic?
If you are based in New Zealand and you see prices in NZD, you may see a different price in your checkout than we advertise in the store. There's a good reason for this - software suppliers set their prices in USD, GBP and EUR, with NZD and other prices calculated based on the exchange rate and often between USD and NZD. Therefore some prices may be slightly cheaper or more expensive than the advertised price as the prices in the checkout are calculated, on-the-fly, from USD. This does not apply to customers in the EU, UK, US, Canada and Australia.
Why Was My Card Declined?
In most instances this will be due to fraud protection from your credit card provider. Although you have protection when you purchase goods, online, through your credit card, your company may decline a large order or an order made through an online store for the first time. If your card is declined, we suggest you speak with your card provider and/or your bank. You can also pay through PayPal, wire transfer or other payment formats.
Can I Ask For A Refund?
We strongly suggest you download and test trial software before placing your order. Trial software is provided to enable you to determine whether it's applicable for your system and meets your requirements. Once you are happy with your trial software, place an order. Digital downloadable software often cannot be refunded unless the order was placed in error. Activated software cannot be refunded as the code becomes the property of the customer and cannot be resold or reused. If you ordered in error or there is another problem with your order, contact PayPro directly for a refund.
Who Keeps Our User/Order Information?
Your transaction is between yourself and e-commerce providers PayPro. PayPro will NEVER re-use your information, pass on to a third party and will not contact you unless you contact them with a query. Your credit card information is not kept on file and is not stored by any third party. If you ordered Extended Download Insurance with your order, we retain basic information about your order on our secure server. This includes your name, email address (required to access your account), serial codes ordered and download links to your software. No-one has access to this information apart from yourself. This information is only available once you have registered your account using the email address you used to place the order.

Write a review

Find What You Need!
Payment Methods
Trusted Partners
AVG F-Secure Auslogics McAfee O&O Software Bitdefender
100% Security
Instant Download 24/7
10+ Years of Service
SOFTWARE STORE
Browse, order, download. It's that simple.