Advice 1: How to verify the integrity of Windows

Check the integrity of system files in the Microsoft Windows operating system can be done with special tools checks your system files Sfc.exe. Specific parameters of the sfc command syntax also permits restoring the corrupted system files.
Instruction
1
Click "start" to bring up the main menu system and navigate to "All programs" to initiate the check the integrity of Windows system files.
2
Open the link to "Standard" and call the context menu of the tool "Command prompt" by right-clicking the mouse.
3
Select "Run as administrator" to comply with security Microsoft and enter a value sfc/scannow in the command line field for immediate check of all protected system files and replace the corrupted version of the source. Press Enter to confirm the command.
4
Use the value of sfc/scanonce to perform the check after the next restart of the operating system and press the Enter key to apply the selected changes.
5
Select sfc/you run to check all protected system files at every restart of the computer, and then press Enter to confirm your selection.
6
Enter the value for the sfc/revert command in the command line box to the abolition of the audit protected files when you download the OS, ie settings, check default, and then press Enter to confirm the command.
7
Use the value of sfc/purgecache for immediate operation clear the file cache and check the integrity of system files and press the Enter key to apply the selected changes.
8
Select sfc/cachesize=x to perform the operation of limiting the size of the file cache to x MB and click OK to confirm your selection. The changes will take effect after you restart the computer and use the command sfc/purgecache.

Advice 2: How to check the integrity of system files

If your operating system crashes often in the form of incomprehensible errors, the system is overloaded or is too slow, then it's time to check the system files. Due to improper shutdown computer, power surges, improper removal of programs or the impact of viruses system files can be corrupted.
You will need
  • computer;
  • - administrator rights.
Instruction
1
Click "start" in the corner of the screen in the line item "Run", type cmd, and press enter on the keyboard. Open a command prompt window. It will appear on a black background, so I do not think that this is another system error.
2
Enter the command sfc /scannow and hit enter. Will launch a system utility Sfc.exe which is designed to analyze the system files. This program scans all the protected files and when it detects unauthorized changes replaces the corrupted file with a healthy copy, taken from a special region of the cache folder.
3
Computer operating system designed in such a way that in many cases it is possible to recover deleted information, restore the system to an earlier working periods, do the backup, therefore, if you encounter any problems, do not panic. If for some reason the system cache is corrupted (it's located at "%SystemRoot%system32dllcache"), enter into the command line of another command sfc /Purgecache. This command will clear the cache and will proceed to immediate verification.
4
If you don't want to do this test right now, you can set it to run at the next system startup use the command Sfc /Scanonce. At every boot of the computer utility will work if you type Sfc /you run. After the work of the utilities you'll need to restart the computer. Follow this procedure at least once in a month or two, and your operating system will work long and smoothly.
5
in the future, try at least store backups of all information stored on local disks of your computer as the situation may be quite different.
Useful advice
The original version of the damaged file located in the folder %SystemRoot%\system32\dllcache.
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