Member Avatar for cama73

Using Norton utilities norton detected a file missing in windows\system32, how do you recover lost files in windows XP? what command do you execute to reinstall system files?

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Quick checklist and what to try first — Norton may have quarantined the file rather than Windows actually deleting it. Check your Norton history/quarantine and the exact filename under C:\Windows\System32 (note the full name and extension). If the file was simply removed by an AV action you can often restore it from quarantine; if it was truly deleted, data-recovery tools sometimes work but success depends on whether the disk sectors were overwritten. Always make a backup (or image) of the drive before you start replacing system files.

Using Windows built-in repair (System File Checker) is the usual next step — that is what was pointing at. SFC will verify protected system files and restore incorrect or missing copies from the local cache or from the installation source when the cache is unavailable; it must be run with administrative rights and may prompt for the XP CD if it needs original files. Bear in mind the caveat mentioned by and : restoring from the original CD can revert files to the “shipping” version and may require reapplying service packs/hotfixes afterward. (learn.microsoft.com)

If Windows will not start normally, use the Recovery Console (or boot media) and extract a single file from the CD’s compressed i386 store rather than doing a full reinstall. The Recovery Console supports an expand command that pulls the compressed file off the CD into System32. Example (replace drive letters and filenames to match your case):

expand D:\i386\filename.dl_ C:\Windows\System32\filename.dll

Make sure you copy a version that matches the OS edition and service-pack level. (learn.microsoft.com)

If many system files are missing or the system is unstable after replacements, a repair (in-place) install from the XP CD will restore system files to the CD’s level while leaving programs and data intact — then run Windows Update or reinstall the service pack(s) to bring patched files back up to date. If you want absolute confidence, reimaging (as does) is a safer, faster way to a known-good state. Also consider trying System Restore (if enabled) before file replacement — it can roll back system files and the registry to an earlier restore point. (learn.microsoft.com)

Simple troubleshooting summary: identify the exact filename and check quarantine → try System Restore (if available) → run SFC (from a running XP session, with CD handy) → use Recovery Console/expand for single-file recovery → repair install or reimage and reapply updates if problems persist.

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Member Avatar for alc6379

put the Windows disk into your CD drive, then run in a Command Prompt:

sfc /scannow

If there are any missing files, that should restore them.

Member Avatar for BountyX

also if the files have been changed in anyway (updated, patched, etc) they will also be replaced.

Member Avatar for cama73

Thanks guys

Member Avatar for kc0arf

Hello,

Question for the group: If you replace the files from the CD-ROM, you would be going back to the "shipping version" and be installing files that may have been patched.

How can one be sure that an unstable condition is not being created? If Microsoft makes registry edits when applying patches, and the user restores from CD, wouldn't the replaced files need to be patched? I fear that the user may be re-introducing errors / flaws by doing this, and would want to know if support patches can be forced from Windows Update.

Personally, I have re-imaged computers when this happens to me, just so that I can be at peace in my mind that the patches are being applied and are accurate.

Just a thought.

Christian

Member Avatar for Geneviev

Hm...Did you try special ? Maybe it can help you. I rely on it in such cases.

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