Win7 and Vista, XP and other old systems can not access each other

Some people may have encountered similar problems. In the LAN system under Win7 system, there is a problem that they cannot access each other's shared files.

Windows 7 uses a different Windows encryption sharing method than the old version. This improves the security of network sharing and also hinders Windows sharing and mutual access between different versions. Sometimes, although shared files can be viewed from each other, in many cases, users can only stay at the level of "discovery" and cannot copy or cut shared files.

In order to simplify the description, I suggest that you first understand the problem that "XP/Windows7 files cannot be shared with each other".

Normally, if you have confirmed that the current system has enabled "network discovery" & "file and printer sharing", and "password protected sharing" (In the "Network and Sharing Center & Rarr; Advanced Sharing Settings" view), but when accessing shared files, still can not access normally, this is likely because non-Windows 7 version of the system does not support 128-bit encryption.

Open “Control Panel →Network and Sharing Center →Advanced Sharing Settings", in the "File Sharing Connection" area, change the system default selection to “Enable shared files for devices with 40 or 56 bit encryption.

Enable “ Enable shared files for devices with 40 or 56-bit encryption in Windows 7 

After the modification is complete, save the settings to exit.

Little knowledge, what is 128-bit encryption?

128-bit encryption does not have a fixed terminology. In general, 128-bit encryption is common on the server side. Obviously, Microsoft introduced it to non-server users in order to improve the security of shared files.

Typically, server certificates are divided into two levels based on encryption strength, namely low encryption level and high encryption level. The low-end encryption strength is 40 bits or 56 bits, and the high-end encryption strength is 128 bits or 256 bits. At the server level, users with low-end encryption can access high-end encryption, which is not entirely dependent on themselves, but also on the customer operating system, browser version, and network server (certificate used). For example, even if the user's current system does not support 128-bit strength encrypted links (ie, high-end encryption), even if the server certificate can support 128 bits, the client automatically reduces the encryption strength.