.REGTRANS-MS File Extension

File created with the Microsoft Common Log File System (CLFS), a Windows component used to create transaction logs; contains transaction read and write information about changes to the user or system registry restore data, which is stored in the NTUSER.DAT or SCHEMA.DAT files; used with a .BLF file to comprise the transaction log.

REGTRANS-MS files are commonly found in these two directories:

• C:\Users\[user]\ - Contains user registry data
• C:\Windows\System32\SMI\Store\Machine\ - Contains system registry restore data