.dll files (also known as Dynamic Link Library). This answer came from my CompTIA training.
Cornerstones was created in 1957.
The program used to store files on windows is called: Windows Explorer.
The boot files are in C://Windows/system32
All the files under C:\Windows, which is what contains the OS.
Most of the important Windows files are located in C:\Windows\System32
You have to use windows restore cd, to repair such files.
By default the tile view files are displayed in the Windows Explorer
The following booting files are required to start Windows XP: NTLDR, Boot.ini, and Ntdetect.com. The following files are optional when starting Windows XP: Ntbootdd.sys and Bootsect.dos. The following files are required to start Windows 7/Vista: Bootmgr (Windows Boot Manager) and BCD (Boot Configuration Data).
The windows XP registry consists of several files, loaded together they constitute the "registry"/ These files are Software, System, SAM, Security, Default, and UserDiff. They are located in Windows\System32\Config and are usually hidden or considered protected system files. One other registry file is called NTuser.dat and is located in the users Documents and Settings folder.
do your own research
No.
No. Windows Media player can't play mkv files.