Sony pcv-rx304 Software Guide
About the softwar
e
on yo
u
r Sony notebook
Installing and updating applications
78
Never delete files with the following extensions: SYS, DLL, OCX, TTF, or FON.
In Windows
®
XP, Windows File Protection prevents the replacement of protected system files such as SYS,
DLL, OCX, TTF, FON, and EXE files. Windows File Protection runs in the background and protects all files
installed by the Windows Setup program.
installed by the Windows Setup program.
Windows File Protection detects attempts by other programs to replace or move a protected system file.
It also checks the file's digital signature.
It also checks the file's digital signature.
* This is an operating system feature that allows executable routines (generally serving a specific function or set of functions) to be
stored separately as files with DLL extensions. These routines are loaded only when needed by the program that calls them.
stored separately as files with DLL extensions. These routines are loaded only when needed by the program that calls them.
File Signature verification
When you install a new application on your computer, you might overwrite system files and device driver
files with unsigned or incompatible versions, which provokes system instability.
files with unsigned or incompatible versions, which provokes system instability.
The system files and device driver files provided with Windows
®
XP have a Microsoft digital signature, which
indicates that the files are original, unaltered system files or that they have been approved by Microsoft
®
for use with Windows
®
.