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Windows 7: SMBv1, 2, 3 - how to tell if installed?

16 Apr 2018   #1

SMBv1, 2, 3 - how to tell if installed?

I'm having trouble getting an external device to see my W7 network.

Online info mentions a possible need for the SMB (Server Message Block) protocols.

I seem to recall there was some recent problem involving the WannaCry virus and SMB, and I'm wondering how to tell if it's still in my system.

A search of Windows Features didn't find any listings.

Any tips? Uh...please don't point me here:

I've looked at there and I'm afraid I'm no wiser. Is there a simple test that will reveal the SMB status in my W7 Ultimate 64bit system?


My System SpecsSystem Spec
16 Apr 2018   #2

Windows 10 Pro x64 x3, Ubuntu

SMB1 has been depreciated by Microsoft due, as you say, to last year's WanaCry incidents

The problem is that SMB1 although outdated is still the default for many "Smart" Network devices, (a lot of Linux versions used in these systems still default to the unsecure SMB1), If you can change your devices to use SMB2 or SMB3 then this is the best way.

In the real world it's not likely to be possible to change the firmware of devices.

Make sure your system is as fully hardened against the vulnerabilities in SMB1 before doing anything (Antiransomeware from a 3rd party is possibly the best idea) check for emergency updates from MS that protect Windows 7 (Win8 & 10 are covered by design) Be careful as the first stage of microsoft's emergency response to Wanacry was to simply switch off SMB1

You need to get to the Add & Remove Windows Features in computer management?? ( not used Win 7 at this level for a while), to change the status of the SMB 1,2,& 3 - make sure they are all active and reboot - you should then find the externals will work, ( if they use the old Computer Browser System, which depends on SMB1 to work, then it could take a few hours to propagate across larger networks )
My System SpecsSystem Spec
16 Apr 2018   #3

Windows 10 Pro x64 x3, Ubuntu

My System SpecsSystem Spec

16 Apr 2018   #4


Thanks Barman58. Now that you mention those events, I remember doing something about the WannaCry thing, but not exactly what

However, I wasn't affected.

Re Windows, features, there's no mention of anything beginning with SMB. I opened up every option and couldn't find anything that looked like it. There are a lot of references in the Registry, however, but nothing in the Lanman\Parameters sections, where it's supposed to be.

Could it be that it has to be re-entered - a DWord value created?

Incidentally, the device I referred to is a Linux-based media player. It won't see past my modem, so perhaps it's looking for a SMB server that isn't enabled?
My System SpecsSystem Spec
16 Apr 2018   #5

Windows 10 Pro x64 x3, Ubuntu

Sorry My Bad

The option in Windows 7 can only be changed by using Powershell as described in the tutorial in my above post

Enable or Disable SMB1 File Sharing Protocol in Windows Windows 10 Tutorials

If the "Modem" is a Router/Modem and it handles network connections then it may have a option to be switched On/Off for the SMB protocols. Also if this is a device supplied by the ISP then they may have been "Helpful" and switched SMB1 off remotely
My System SpecsSystem Spec
16 Apr 2018   #6


Thanks again, Nigel. You seem to have a handle on this fairly obscure topic, and you've already provided more info than I've been able to glean from other sources.

The modem is a Thompson TG582n, provided by NZ Telecom, or 'Spark' as they're now called. I don't know about their involvement with the SMB deployment but I'd guess against it. That modem was released some time before the WannaCry virus appeared.

Regarding the Linux 'reliance' on SMB, this brings up another of my issues: I have several Western Digital TV Live media players which have no trouble connecting to my network.

BTW, the network is hard wired: an RJ65 cable connects my network to the media player, and the player's connected by HDMI to the TV.

So, given that Western Digital media players run Linux-based software (AFAIK), I wonder why they easily see my PC file source, while the new box - a Vero 4K - does not.

Any thoughts on this?
My System SpecsSystem Spec

 SMBv1, 2, 3 - how to tell if installed?

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