up vote 1 down vote favorite
share [g+] share [fb]

I have a really strange problem. I am using Windows 7 Professional with SP1 installed. I have a My Book 500GB external hard drive connected to the network via Linksys E3000. Now in Windows 7 I am logged in as Admin. The network disk is configured in Linksys, that an admin group can r&w. Now I have added this settings to Credential Manager, where I have specified network address of disk, username and password. I have added it, because otherwise the Windows 7 would forget the username & password on restart of the system.

Now the network disk is working without problems. I can access file, write files on it, delete files from it. The problem arises, if I want to delete folder, that contains other files or folders. Now here for some reason it displays this error:

enter image description here

I tried Try Again, it displays Error 0x8007045D (I/O error):

enter image description here

This error is supposed to happen, when there is something wrong with USB port, or USB drivers, but this drive is not accessed via USB, it is a network based disk. Also, I don't have any problems with devices connected through USB, not that it matters in this problem.

Then I clicked Cancel. Now what is really strange about this is, that the folder has gone missing! I will be able to see it again, if I reconnect the network disk, or restart the computer. Now I really don't understand about the permission thing, becuase I am already Admin. I have looked up under network disk properties -> security, and this is want I have found:

enter image description here

As you can see, it seems the account Account Unknown is what controls what can be accessed. It only has Special permission allowed. So I tried to change it to allow everything (which probably would not make a diffrence, because it seems that under that Special permission falls almost everything, as I said I can do everything except delete folders, that contain other files or other folders). When I wanted to apply the Full control that I have selected it gave this error:

enter image description here

It seems that I cannot change this permission. So I wanted to know who exactly is behind this permission, and I got this under Advanced -> Owner:

enter image description here

I guess the Linksys E3000 operates this permission. But as I have said in the first paragraph, I have setted the disk to adming group under Linksys E3000 setup (192.168.1.1), which means it has full r&w access.

Now the strangest thing about this thing: I have also another computer, that has Windows XP SP3 installed on it. I also have the network disk added to the computer. The diffrence is, that there I am also able to delete folders, that contain files or other folders. It deletes them without any error.

Also if I connect the disk to computer with Windows 7 on it (the one that I have problem deleting folders that have other folders or files inside it), then I can delete this folders without any problem. I would like to point out, that I also tried this on my second computer (laptop), that also has Windows 7 SP1 installed, and it displays the same error, which means that there must be something with Windows 7, otherwise the Windows XP would gave the same error.

I really don't understand why I am able to delete it from Windows XP, but not from Windows 7. The computer, that has Windows XP installed is connected through Linksys E3000 LAN via UTP cable just as is computer, that runs Windows 7. Please help me with my question and thanks for any answers!

Edit: Adding screenshots of Local Group Policy Editor:

First part Second part

link|improve this question
Did you create the items you are trying to delete from the XP box? – KCotreau Jul 26 '11 at 17:05
No, I created them on Windows 7 computer. – Jernej Jerin Jul 26 '11 at 17:06
What firmware version is installed on the E3000? What's the file system format on the MyBook? – techie007 Jul 26 '11 at 17:22
Linksys E3000 Firmware Version: 1.0.04 build 6 Dec 6, 2010. MyBook File System: NTFS – Jernej Jerin Jul 26 '11 at 17:48
feedback

1 Answer

up vote 1 down vote

The fact that XP doesn't have these problems but WIn7/Vista do is a dead giveaway. One of the biggest network changes in Vista/7 was the introduction of SMB v2.0. Along with that, they considerably beefed up the Windows Authentication process for the NTLM.

More than likely, the Samba server running in MyBook isn't up to date compatible with NTLMv2 and/or SMBv2. In general, Vista/7 will balk at older authentication methods that XP was ok with.

Some of the settings you should try. Go to your 7 gpedit.msc:

  • Biggest one is check the LAN Manager Authentication Method. Vista/7 uses NTLMv2 only. XP can also use NTLMv2, but falls back to NTLM. Switch the setting to Send LM & NTLM. (the Default in XP was actually send NTML only)
  • Network Security: NTML SSP Session security: Unlikely this is the soluiton, but 7 now requires 128 bit encryption
  • Network access: Allow Anonymous SID - Enabled -Domain Member: Digitally encrypt..... (always) This was disabled under XP. XP used the "when possible" option.

I hope some of this helps

Try those two settinga and we can go from there

*Edit *

I should probably clarify where I'm going with this. Basically, we are reproducing XP's network security settings one by one on the Windows 7 machine until we see where it hiccups.

All the way to the point where we are just authenticating as anonymous and logging on with a guest account :) It's possible that the software inside the MyBook could just be straight up incompatible with Win7's network security.

link|improve this answer
When you tried to take ownership, the reason it says, "LinksysE3000\Administrators" is because that's how you authenticated with the Mybook. By principle, you can't change ownership to another account, only to your account. So that's how I would troubleshoot your situation. It's likely, the XP machine authenticated through the Everyone group. By default, anonymous connections are put into the Everyone group. – surfasb Jul 26 '11 at 19:57
First of all thank you for your answer. Now I will go through your solutions. 1. solution: Had a problem finding the LAN Manager Authentication, so I went looking on the net, I found this:groupes.polymtl.ca/gchit/?page_id=238. I found out, that it was set to Not Defined. So I set it to Send LM & NTLM, as you said, but this did not solve the solution. I wonder if I should set it to Send LM & NTLM – use NTLMv2 session security if negotiated, as the tutorial on that link specifies? – Jernej Jerin Jul 26 '11 at 21:12
2. solution: I have two Network Security: NTML SSP Session security defined, first one is: Network security: Minimum session security for NTLM SSP based (including secure RPC) clients and the second one is: Network security: Minimum session security for NTLM SSP based (including secure RPC) servers. Both have Require 128-bit encryption checked, but Require NTLMv2 session security unchecked. – Jernej Jerin Jul 26 '11 at 21:16
3. Solution: I have set Network access: Allow anonymous SID/name translation to Enabled, was previously Disabled and Domain member: Digitally encrypt or sign secure channel data (always) is set default to Enabled. I do not recognize from your answer, do you want me to disable it? – Jernej Jerin Jul 26 '11 at 21:21
Ok I have also tried Send LM & NTLM – use NTLMv2 session security if negotiated, as was recommended in that tutorial two comments above. But with no success. @surfasb: Isn't that really strange, that it would not let me delete a folder in a folder? I mean I would be suprised, if it would not let me delete a file or a empty folder, but this is just plain silly. Please continue with your expertise, I would really like to get to the bottom of this. – Jernej Jerin Jul 26 '11 at 21:38
show 5 more comments
feedback

Your Answer

 
or
required, but never shown
discard

Not the answer you're looking for? Browse other questions tagged or ask your own question.