Recover a Corrupted System File
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If an essential Windows file gets whacked by a virus or otherwise corrupted, restore it from the Windows CD. Search the CD for the filename, replacing the last character with an underscore.
For example: Notepad.ex_
If it’s found, open a command prompt and enter the command EXPAND, followed by the full pathname of the file and of the desired destination: EXPAND D:\SETUP\NOTEPAD.EX_ C:\Windows\NOTEPAD.EXE. If either pathname contains any spaces, surround it with double quotes.
If the file isn’t found, search on the unmodified filename. It will probably be inside a CAB file, which Win XP treats as a folder. Simply right-drag and copy the file to the desired location. In other Windows platforms, search for a file matching *.cab that contains the filename. When the search is done, open a command prompt and enter EXTRACT /L followed by the desired location, the full pathname of the CAB file, and the desired filename; for example: EXTRACT /L C:\Windows D:\I386\Driver.cab Notepad.exe. Again, if the destination or CAB file pathname contains spaces, surround it with double quotes.
[...] Considerat multa vreme unul dintre cele mai vulnerabile Internet Browsere, Microsoft Internet Explorer este si la ora actuala cel mai folosit browser, dar si cel mai expus la erori. Erorile apar in general din cauza afectarii / schimbarii unor fisiere care stau la baza functionarii IE. Aceste schimbari apar un urma unor atacuri malware, spyware sau a virusilor care produc modificari in dll-uri si / sau ocx-uri. Corrupted files. [...]