Access Windows 10 share from Windows XP

It SMBv1 problem and remember, if you enable and let old system access windows 10 share then nasty thing can do nasty things too

In Windows 10 side
Control Panel -> Programs -> Programs and Features -> Turn Windows features on or off
or
Settings -> Apps & features -> Programs and Features -> Turn Windows features on or off

SMB 1.0/CIFS File Sharing Support -> SMB 1.0/CIFS Server
switch it on

Powershell command: Enable-WindowsOptionalFeature -Online -FeatureName smb1protocol

Here link

For authentication:

click 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.

In the Advanced sharing settings page of Network and sharing center, you need to have it set as Privat profile. (through HomeGroup)
Enable network discovery
Turn on  file and print sharing
Turn on password protected sharing (guest are disabled and you must have user with password that you can access share)
Enable file sharing for devices that use 40- or 56-bit encryption

If a HOME version of win 7
1. Launch regedit from Start Search box.
2. Find the following branch.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
3. Create a DWORD key under Lsa and set:
Name: LmCompatibilityLevel
Value: 1
4. Restart.

Here link  (I little modifed inf about firewall settings from this link so it work)

And windows 10 needs restart before accepting this


If windows XP you use different username/password then run
CONTROL USERPASSWORDS2
And enter needed info