Windows System file check: a smart guide


+2 votes

Good day to you!

The case is that my computer for a long time had been used by a person, who has no idea about dealing with computers, but thinks that he is a computer genius. The result is that now Windows 10 operates extremely slowly, various mistakes keep on appearing and plenty of malicious and unnecessary programs have been installed. I have coped with the programs and viruses, but how can I check integrity of the system files to be sure that the system hasn’t been damaged?

asked Dec 19, 2016 in System administration by Nick

1 Answer

0 votes

Good day!
Of course, Windows contains special utilities for checking system files integrity – DISM and SFC. In this article I will review only DISM, for SFC not always can identify and remove problems. There is no point in using the incomplete utility, if there is the normal one.

Windows System files check

1. Run the command prompt as administrator (if you don’t know how to do it, we have a special article: How to run apps as administrator - instructions).
2. If you only want to check Windows system files integrity without restoring them, run the following command:

dism /Online /Cleanup-Image /ScanHealth

The procedure may take plenty of time – from several minutes up to several hours. Moreover, the indicator may get stuck at twenty percent for a long time, it’s a common case.

check Windows system files integrity without restoring


3. If you want to check and restore Windows system files integrity, run the following command:

dism /Online /Cleanup-Image /RestoreHealth

This procedure may also take a lot of time and hold off at twenty percent of completion. If you want to restore system files integrity at once, you can immediately run this command and miss the point 2.

Restore system files integrity


The above described operations are completely safe for your system, but there is one point. If you have in some way customized your Windows system, for example, have started RDP in home version or installed non-standard programs, all these alterations will be deleted.
If you have any questions left or need some details – please, ask a question or leave a comment.

answered Dec 19, 2016 by Expert Brian (5,370 points)
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