Must enter username/password to access NAS

You should check in windows credentials manager to see what username and password is registered for the NAS. If necessary, delete whatever is there and enter the credentials you want windows to use.

Thank you!
But I don't want to use any credentials at all.
I never had to login before. And the ones that don't need username/password access the NAS anonymously.

I've never had to login to my Buffalo NAS.
And now I'm on a completely new install of Windows and it's asking for credentials.

It is still a good idea to check the windows credentials manager, and delete any credentials for the NAS that are saved in there.

By default the windows PC presents the Windows login/password to the NAS as the credentials. If that user doesn't exist on the NAS, then the NAS will apply guest access permissions.

If the user does exist, then access is denied if the password is incorrect. That is often the issue if the PC username is "admin"

Thanks
I checked the credentials manager and removed everything that was in there but it did not help.
I did however notice that one folder suddenly appeared.

I have 6 folders that I share and access through Windows Explorer. These folders have names such as "Documents", "Photos", "Videos" and so on..
When I click on the NAS in Windows Explorer I can see ONE of the above folders. When I double click it I can see 2 files that are in that folder but I know there are many more in there.

What's annoying is, Windows Explorer no longer asks for credentials to login. So I'm stuck seeing this one directory only. How do I login if Windows Explorer doesn't ask for credentials?
I have logged into the NAS admin and compared the directories and they all look the same. So why won't the other 5 show up? And why can I only see 2 files?

Should I reset the NAS (RN102) and reinstall the OS?? This is getting really tiring. I'm using the latest firmware but I have updated the firmware 3-4 times since I purchased it.

I just found a solution. I don't understand WHY I have to do this though.

To get it working:
1. Open NAS admin and click "accounts", then "new user"
2. I named my user: "user" and set password: "password". Keep it simple.. the rest I didn't touch
3. Now that we have a user - open Windows Credentials Manager
4. I created an account for both my IP (192.168.1.x) and my NAS (\\NAS)

I then rebooted both the NAS and the PC. Probably not needed but just in case.
This did the trick. But as I said above.. I don't know why I had to do this on this PC. Windows is completely reinstalled so there shouldn't be any old settings lying around.

Were you logging into that PC using "admin" as the user name before you reinstalled Windows? Note my post above.

No, I don't have any password registered to my windows account - it boots directly into my desktop.

It still has a user logon, it just applies it automatically. Do you know what that is? What version of windows?

It's Windows 7. I'm not sure what the default user is. I tried googling it but couldn't find anything useful.

enter cmd in the windows bar, which will launch a windows command box. Then enter

whoami