Russian based Anti-virus provider Kaspersky has apologised to users following a faulty anti-virus update that has left thousands of machines unable to connect to online services.

It would seem that Kaspersky users running Windows XP have primarily been affected leaving their machines in a state where an automatic fix can’t be applied.
The Kaspersky forums are awash with comments with one large user in particular here complaining after 12,000 of their machines were affected.
Kaspersky has released the following statement and advises affected users to carry out the procedure detailed therein.
“We apologize for the inconvenience. It does appear that there was a hiccup with an Update pushed out causing Windows XP machines to lose internet connectivity. An update was just released that should address the issue, what I will need you to do is:
To get XP users internet connectivity (temporarily), please disable the Web AV component of your protection policy for your managed computers. After doing so;
In Security Center (or Admin Kit):
1.) Go to the Repositories section >> (Right click) Updates >> All Tasks >> Clear updates repository.
2.) Go to the Repositories section >> (Right click) Updates >> Download Updates
After taking this step, please run your group Update task for Managed Computers. After the update has been pushed to your workstations, please re-enable your Web AV component in your protection policy. This should resolve the issue.”
Rather worryingly though it requires users to disable anti-virus security before going online unprotected to download an update.
Faulty anti-virus updates have of course been released before with the consequences varying from minor annoyances, to prolonged downtime, and everything in between.
The BBC also discusses this story here.
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17 Comments on Kaspersky update cripples thousands of PCs
"Your computer is now safe!"

"It prevents hackers from crippling your system" -person B
"How was yours crippled?" -person A
"It was crippled by my security software". -person B

Attached was a html "invoice", which asked you to click a link, which opened a non threatening (apparently) ups website, that then asked you to download your invoice ... which was called "invoice #random number#.jpg.exe" and view it.
Now this file was also non malicious. I used a site to scan it using all available antivirus, and 20/21 considered it non-malicious, and the one antivirus I've never heard of considered it malware.
I'm not entirely sure that antivirus are any real protection any more. The only protection is common sense.
On the last year, I've had to rescue multiple pcs (avast and avg) which were rendered unbootable, and even when in safe mode were unrecoverable.
I'm not sure what causes more trouble now.
My complaint since Microsoft delivered Defender then Security Essentials is that, when virus-warnings might pop up, Microsoft doesn't display their precise product's name in the Active Window Title Textbar.
If MS Security Essentials detects a threat, the dialog box's Active Title doesn't read "Microsoft Security Essentials" but some other vague Microsoft AV name.
Just like hijacker dialog boxes do - "Windows Anti-Virus" looks AS authentic as Microsoft's own Active-Window title spellings, yet that was an early Hijacker Website's attack method.
How could most users detect Real vs. Fake when their real Microsoft products refuse to use their real and specific names?!! Answer: users CANNOT.
And one of the worst aspects is that a careful user may seldom see a virus alert, so after months or a year or more with "Microsoft Defender/Security Essentials" protecting them, they see a vague "Windows Anti-Virus Alert" titled dialog box and what's the first reaction?!! "SAVE ME!! PROTECT ME!!"
And kablooey - the virus has been invited in and uses that User's Rights to disable any and everything else.
And Microsoft merrily says, "That calibre of User has the rights to injure or destroy the Windows installation."
If MS would use Precise & Exact Active Window Spellings and THEN install an interrogator-code that says, "If these words are used by any other Dialog's Title, check the IP address against Microsoft's authorized ones..." then most hijackers would be a far lessened threat.
But since Microsoft programmers apparently can't spell or won't use precise and exact names, then the consumers are left at the mercy of any willy-nilly hijack threat.
Common Sense is our best defense but Microsoft helps to undermine even THAT solution.
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My complaint since Microsoft delivered Defender then Security Essentials is that, when virus-warnings might pop up, Microsoft doesn't display their precise product's name in the Active Window Title Textbar.
If MS Security Essentials detects a threat, the dialog box's Active Title doesn't read "Microsoft Security Essentials" but some other vague Microsoft AV name. |
I just tested with a zipped EICAR test file, and my Microsoft Security Essentials popped out with an info-window with the title "Microsoft Security Essentials".
I used AVG for a long time but decided Avast is better (for me ).
I also use MBAM & SpywareBlaster.
I also ocassionally use a portable of another AV in safe mode & another AV I keep inactive & use in safe mode.
I've received the same type of e-mail debro's boss did.
It has came disquised several ways:
UPS,First class mail,USPS, & sometimes a name.
I think a few others I forget .
I don't actually "open" them.
I go in from the "backdoor" by right clicking , selecting "Properties", then"Details" , &"Message Source".
From there I can read the text & determine where it was actaully sent from.
Usually a very suspicious e-mail address. One I doubt would receive an e-mail if I sent one.
So far I haven't got a virus this way . I usually get one or two of these a week.
The e-mail address never seems to be the same so filtering or blocking isn't an option. I beleive the way I'm checking them is safe & I wanted to post it for others to use .
And tell them to beware of this type e-mail.
Thanks for that update but, no, I am NOT interested in testing!!


Like a lot of folks, MalWareBytes is the Big Stick and I've got machines running a variety of the freebie vendors' stuff.
I am pretty unhappy that more vendors don't supply a bootable ISO (downloadable, update-able) for their paying customers.
Kasp probably needed this 'come-uppance' issue - they've had a fairly great reputation for a long time.
I don't mind the occasional failure. If they were 'perfect', I'd probably be far more suspicious. But how they react to failure - that's how I ultimately judge vendors.
AV progs create a false sense of security.
There are ways to setup a browser....that will keep malware from entering a computer...but downloads from questionable sources are always a problem.
Also the new GUI seems to have been inspired by Microsoft's bad GUI designs of late, but that's a different story...
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Kaspersky sucks. Microsoft Security Essentials and Malwarebytes Anti-Malware PRO for me.
![]() |
PC Pro recently carried out their group tests again and MS Essentials ranked last, letting through 41% of the test threats.

That's way too high by anyone's standards.
Wombler
I think I'll again get Kapersky next time a stupid price deal comes up as they usually are one of the top rated security suites and I never had a issue but anything can have a glitch now and then. I don't use XP anymore and will probably stick with 7 as long as I did with XP because it works well for me so why change.
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I've received the same type of e-mail debro's boss did.
It has came disquised several ways: UPS,First class mail,USPS, & sometimes a name. I think a few others I forget . I don't actually "open" them. I go in from the "backdoor" by right clicking , selecting "Properties", then"Details" , &"Message Source". From there I can read the text & determine where it was actaully sent from. Usually a very suspicious e-mail address. One I doubt would receive an e-mail if I sent one. So far I haven't got a virus this way . I usually get one or two of these a week. The e-mail address never seems to be the same so filtering or blocking isn't an option. I beleive the way I'm checking them is safe & I wanted to post it for others to use . And tell them to beware of this type e-mail. |
These Days, it's probably best to test all mail in plain text, or block all external content, until you know who it is from, and whether whatever they have sent you makes sense.
I've never actually received email notification from any postal service with "invoice attached". Typically incoming international postal services will call, and it takes several attempts for them to get information to you.
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