The PC Doctor's Fix-it-Yourself Guide- P7: A technical director for a UK-based computer company who teaches such courses as Caring for Your PC has developed prescriptions for treating sick PCs. Arguing the benefits of fixing it yourself rather than relying on experts, his mission is to empower users with trouble- shooting and safe repair skills. | CHAPTER 2 Files and Folders 39 Name Size Type Date ModiFi j 159 KB Application Extension 29 08 2002 137 KB Application Extension 29 08 2002 61 KB Application Extension 29 08 2002 F 158 KB Application Extension 23 08 2001 234 KB Application Extension 29 08 2002 107 KB Application Extension 23 08 2001 j 545 KB Application Extension 29 08 2002 89 KB Application Extension 29 08 2002 16 KB Application Extension 23 08 2001 f N 96 KB Application Extension 01 07 1999 1 1 135 KB Application Extension 01 07 1999 63 KB Application Extension 12 12 2002 101 KB Application Extension 23 08 2001 Al 113 KB Application Extension 29 08 2002 A 153 KB Application Extension 29 08 2002 A 271 KB Application Extension 29 08 2002 . 19 KB Application Extension 27 04 2000 A 8 KB Application Extension 11 12 2002 A 15 KB Application Extension 29 08 2002 76 KB Application Extension 23 08 2001 i l 32 KB Application Extension 22 01 2001 r l 370 KB Application Extension 29 08 2002 198 KB Application Extension 29 08 2002 A 825 KB Application Extension 29 08 2002 _ 900 KB Application Extension 29 08 2002 FIGURE 2-7 A whole bunch of .dll files replacement of the text-based DOS command screen and the widespread use of the graphical user interface of the Windows environment .com files are now rarely used. System recovery from problems that cripple the actual operating system are a common use for the .com file nowadays. Although command files aren t as common as they were a few years ago they are still in use. If you search your PC you will likely find a few on your system. I found one on Windows XP NTDETECl T Mb-DOb Application H7 KB. .bat Files with the .bat file extension are another set of .