In french/english sorry. I installed a dual boot PC with windows 7 and XP Pro. When I wanted to access my NAS on my network, the system asks for a user name and password. I did not set up a user name/password for that network. Problem is that I am not able to erase the indications in the input areas and thus access my NAS Thank you Jacques

On the face of it, I'd say that your account name & password (in Win7) aren't quite right.I don't think that you're being asked for a username\password to access the network (if you were, you'd need to enter that to do so much as browse the internet); rather, you're being asked for a username\password to access the NAS.This would indicate that your NAS does have user-account controls in place on it (in other words, user authentication for its shares.)If you enter a valid username\password (as an example, the account name & password for your user account in XP), are you able to access the NAS?Make and model of NAS?[If this post helps to resolve your issue, please click the "Mark as Answer" or "Helpful" button at the top of this message. By marking a post as Answered, or Helpful you help others find the answer faster.]

Try using NASName\guest with no password whereNASName = the name your NAS shows on the network. If that doesn't work the NAS may not be compatible with Vista and Windows 7 networking. Most NAS devices use an embedded Linux with Samba for file sharing. Older versions of Samba are not compatible with the way Vista and Windows 7 authenticate. What is the model of your NAS? Have you checked with the manufacturer to see if it is Vista compatible or if there is a firmware upgrade to make it so. If it can work with Vista then it should work with Windows 7.Kerry Brown MS-MVP - Windows Desktop Experience

Or just fix windowsclick the start button and type secpol.msc in the search function. Browse to "Local Policies" -> "Security Options". Now look for the entry "Network Security: LAN Manager authentication level" and open it. Click on the dropdown menu and select "Send LM & NTLM - use NTLMv2 session security if negotiated". Apply the settings.EDIT:I should not say fix windows as to do the above will weaken security, soI should say dumb down windows to work with samba.

Wouldn't you know? As soon as I posted I solved the problem. My user ID on the NAS is the same as my user ID on Win 7. When I set up the mapped drive, I entered just plain userid instead of NASname\userid. Somehow, this works ok if you enter it into the dialog, but does not work for auto reconnect. (Who knows why?) I disconnected, remade the connection using NASname\userid, and all is well. It now reconnects at logon, and my other startup stuff works as well.

Make and model of NAS? Make and model of NAS were in my initlal post: Promise NS4300N (otherwise known as "Smartstor") 4 drives configured RAID 5.