Hi Everyone,I was trying to perform a backup across our peer-peer network from a Windows 7 computer to an XP Pro computer. The user has full access to the additional harddrive on the XP computer, but I get error code 0x81000039, remote share path not available. I believe this was towards the end of the backup, but I was not watching it the full time. Any suggestions?

Hi,Can you please run backup and send me the logs at <Windir>\logs\WindowsBackup and send me a mail to Soudamini[dot]Sreepada[at]microsoft[dot]com? Thanks,S.Soudamini.

Hello Soudamini, I tried uploading the file to you from my work e-mail address, ffrahm[at]theservicegrou[dot]us, but it came back with mailbox size exceeded. I have also sent you this information from the above e-mail address. The file is 10MB in size.Where can I FTP or e-mail the file to? Best regards,Frederick C. Frahm

It should be a network issue. Lets try some steps. However, please note that implementation of crossover cables is beyond the scope of Ethernet 802.3 standard Using Crossover Cables in Home or Peer-to-Peer Networks You can temporary disable the firewall on the Windows XP computer. If the issue persists, please make sure that Simple File Sharing is disabled and you need to access the Windows XP computer from the Windows 7 computer with a valid certificate of the Windows XP system.How to disable simple file sharing and how to set permissions on a shared folder in Windows XPArthur Xie - MSFT

Hello Arthur, I would suspect it is a network issue too, but I tried this a total of 5 times, 3 of them resulting in the network error. I do not remember what one of the errors was, but I know the other error was a Only one image is allowed on this drive type error. At this point I tried one last time and it was after restarting both computers, logging in, waiting till both systems were idle, and then creating a new folder on the remote drive so that there would be no more, "Only one image" errors. I had no problems creating the new folder, Jason7, on the remote drive. This is the same network drive that I use to backup this computer when it had Vista on it.Unfortunately I am not physically located in the facilities so trying a crossover cable is a little more than difficult at this time. :)Just out of curiosity I tried it on two computers running Windows 7 RC here at my house. I have the same network type setup and addressing as at the office. I was able to successfully complete a backup from my laptop to my home desktop, so that was no help in figuring out this problem. It did actually put almost 19GB of zip files on the network backup location. This happened all three times when I got the network error. Also both computers have battery backup as well as the network switch, router, and modem so power kicking out would not have been the problem. None of the UPSs recorded any spikes, noise or anything. It appears to be a problem at the end of the backup and whatever process it is doing near the end of the backup. I was able to upload the last three tries log files to Soudamini yesterday and today he said he would be getting back with me.Anything you can think of I can try remotely?Best regards,Frederick C. Frahm

Please try the following steps on the Windows 7 computer to change the NTLM authentication level: 1. Click Start. Enter gpedit.msc in the Start Search box. 2. Locate to Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Options\3. In the right pane, double-click on Network security: LAN Manager authentication level. 4. Change the level to Send LM & NTLM - use NTLMv2 session security if negotiated.Arthur Xie - MSFT

I have the same problem, I tried the "Send LM & NTLM - use NTLMv2 session security if negotiated" solution and it did NOT solve the problem. I know this is not a network issue because I have another Windows 7 Ultimate computer that is backing up to a network share no problem (same network, different share drive). The only differences between these two computers are hardware (dell studio xps does not work, dell latitude D531 does work) and 64-bit vs 32-Bit (64-bit does not work, 32-bit does work). Please un-mark this answer, it did not change anything.

I have the same problem and also Windows 7 64-bit enterprise. Before i had 32-bit version and backup worked just fine.

Hi Arthur Xie, I have recently set up a wireless external hard drive on my wireless network. All of the other computers connected to the drive wirelessly through the network don't seem to have a problem backing up (they are running on Mac OS). Everytime I run Windows 7 backup to my drive on the wireless network it gets to 25% during the "copying files to ...." stage and then I get the following error message: Windows backup did not complete successfully. Check your backup. Windows Backup encountered an error when accessing the remote shared folder. Details: The specified network name is no longer available. Error code: 0x81000039. I have already tried a suggested fix to change the NTLM authentication level: 1. Click Start. Enter “gpedit.msc” in the Start Search box. 2. Locate to Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Options\ 3. In the right pane, double-click on “Network security: LAN Manager authentication level”. 4. Change the level to “Send LM & NTLM - use NTLMv2 session security if negotiated”. However this did not work. Also, none of the other computers are backing up while I'm trying to. Please help. Des

Thanks Arthur Xie for the LAN Manager authentication level group policy tip. I was having the same issue (error code 0x81000039) with a win7 -win7 backup and that did the trick. :)

If the issue persists, please help collect backup log files: The backup log file is located: %windir%\Logs\WindowsBackup Please look into the log files and note what file is skipped.