How To Repair Windows 7 Program Installer
How to Repair a Faulty Windows Installation Without Reformatting
Corrupted system files don't have to ruin your day
Nothing will put a crimp in your calculating style quite like a Windows mistake. Although Microsoft's OS has gotten exponentially more stable over the years, it's still very possible for Windows system files to go corrupt, which can cause your system to slow downwards, freeze, or (in the worst case) refuse to load your operating system at all.
When you lot encounter a Windows fault, your first instinct may be to support your data, grab the ol' installation disk, and weep silently every bit y'all press the Reformat button. We're here to tell y'all there's another mode. However back up your data, of grade, just past following this guide, you lot might well be able to repair your Windows install without dropping the nuke.
Note: Though these guides are written for Windows seven, a very similar procedure volition work for Vista or XP.
Method 1: Repair Windows Fifty-fifty If You Tin can't Go To Your Desktop
The outset method will allow you to repair decadent system files, even if the trouble is so astringent that y'all can't kick all the fashion to your desktop. For this method, you'll need a Windows installation DVD, so runway down yours or borrow one from a friend—it doesn't matter if the DVD'southward version matches your license, as long as information technology's the correct fleck count.
Step 1: Insert the Install Disc and Reboot
If your system won't boot into Windows, you'll need to boot from somewhere else—in this case, the installation DVD. Your figurer should be set up to boot from your optical drive before your hard bulldoze, merely if information technology's non, you can always modify the boot priority in the BIOS. When the arrangement starts up, make certain you press a key when prompted to boot from the Windows installation disc. When you do, you'll run into the familiar Windows installation language-choice screen (epitome below).
Step 2: Get to the Command Prompt
The recovery tool we're going to utilize is run from the command prompt, which tin can (thankfully) be accessed through the Windows installation disc. To go there, don't click Install Now in the center of the screen, but instead click Repair Your Computer in the lower left. Click Side by side on the first carte that pops upward.
The next menu will take two radio buttons. Make sure the start one is selected, and note that in the text box, your System drive might not have the bulldoze alphabetic character C. If that's the case, make a annotation of the drive letter used. Click Side by side, and on the following screen (image higher up), select the bottom selection, marked Control Prompt.
Footstep 3: Scan Your System
Finally yous're ready to scan your system files for errors. To do that but run the post-obit command:
sfc /scannow /offbootdir=[DRIVELETTER]:\ /offwindir=[DRIVELETTER]:\windows
Substitute the drive letter you lot noted before for [DRIVELETTER]. There should be no square brackets in the control (image below).
Windows will now endeavour to observe and repair any errors in your organization files. If the browse finds errors, you lot may need to repeat the steps in this guide until information technology finds no more than errors. To restart your reckoner, enter the exit command, and so click the Restart push button. When yous're gear up to try booting into Windows again, remove the install disc and restart one last time.
Method 2: Reinstall Windows Without Losing Any Information
If yous are nevertheless able to get to your desktop, you've got boosted options. You lot tin even so use the command prompt to scan every bit in the previous method, but there's another way that may be more thorough: reinstall Windows.
Wait, didn't we say you wouldn't have to reformat? Nosotros did, and you don't. It's possible to do an in-place, nondestructive reinstall of Windows, which will restore all your arrangement files to pristine condition without damaging any of your personal data or installed programs. All you'll need is a Windows install DVD and your Windows CD key. Hopefully you still take your central written down somewhere, but if y'all don't, you're not out of luck. You tin use a program like ProduKey, bachelor for free, to rapidly recover your Windows product cardinal from the registry.
Important: Before continuing this procedure, note that it tin can cause issues with your installed programs, and then don't do it just for fun, and brand sure to back up your important data and create a restore point before continuing.
Step one: Do Some Prep Work
Earlier you can become started, there'due south i important consideration: Yous can't repair a Windows 7 SP1 install with a pre-SP1 install disc. The ideal solution is to borrow a newer install disc with SP1 included (or download it, if you accept admission to a TechNet account), simply it'due south also possible to uninstall SP1. To do this, open the Control Panel, select Uninstall a Program, and so cull the option to view updates (image below). You tin right-click the Service Pack update to uninstall it.
Step 2: Insert the Install Disc
We're once again using the Windows install disc, only this time nosotros're non going to kick from it. Only insert the disc, and when the autorun bill of fare pops up, choose to run setup.exe. Once more, you'll find yourself staring at the Windows 7 install screen. This fourth dimension, do click the Install now button (image below).
Stride 3: Reinstall Windows
Finally, it'due south time to get downwardly to business. Afterward the installer gets past the Copying Temporary Files… screen, you'll exist asked about getting updates for installation files. Go ahead and do this, equally long as your computer's network connection is still working.
When the installer asks what sort of installation you lot'd like to perform (paradigm below), ignore your natural instinct to cull Custom, and instead click Upgrade. Sure, you're not technically upgrading from one version of Windows to another, only we practise want to do the kind of nondestructive install that the update option performs. Think of information technology as upgrading from a broken version to a non-broken version, if you must.
After that, all that'southward left is to sit through the usual Windows vii installation process, with its multiple reboots and endless progress confined. When it's washed, you'll accept to reactivate Windows by entering the product key that you found or wrote down before.
All that's left to do is to permit Windows install whatever security updates or service packs that information technology'due south missing, and reboot. All your system files should now be fully restored!
Source: https://www.pcgamer.com/how-to-repair-a-faulty-windows-installation-without-reformatting/
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