You are in the right place to repair your Windows 10 system.
It is inevitable that your gear may have some issues due to the long-time usage.
Most people take the assistance of aninstallation discor CD to repair it.

However, if you dont have any of them with you, is it possible to repair Windows 10?
The answer is of course yes.
Lets proceed and learn how to repair Windows 10 without CD.

How to Repair Windows 10 Without CD?
Method 1.
Launch Automatic Startup Repair in Windows 10
How to repair Windows 10 without CD?

Just follow the comprehensive tutorial.
How To Access, Use, And Repair WinRE.
Step 2: Then selectAdvanced options.

Wait for the result patiently.
However, it cant diagnose all the problems and fix them sometimes.
Method 2.

Perform a System Restore
How to repair Windows 10 without CD?
Step 1: Proceed to Windows 10sAdvanced Optionsmenu as step 1 from the previous method described.
Step 2: ClickSystem Restoreand your box will reboot.
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Step 3: Select your account and drop your password.
Method 3.
Then we will show you how to fire off the BootRec tool to fix problems.

Step 1: After you enter the Windows Recovery Environment, go toTroubleshoot, and selectCommand Prompt.
Step 2: Select your account and slide in your password if required.
Then punch in the following commands one by one in the command line window.

like remember to hitEnterafter typing each command.
Method 4.
Run SFC Scan for System Repair
How to fix problems with Windows 10 without CD?

Then you will be given a detailed tutorial to run an SFC scan, just follow the steps.
Step 1: In the Advanced Startup Option interface, go toTroubleshoot, and selectCommand Prompt.
Step 2: Typesfc /scannowand pressEnterto start the scanning process.

If it diagnoses any problem, it will attempt to fix it.
Then you could reboot your rig and test whether your problem has been solved.
Method 5.

Perform System Image Recovery
Step 1: pull up the Windows Recovery Environment as step 1 in method 1.
Step 2: ChooseTroubleshoot>Advanced Options>System Image Recovery.
Step 3: Select your account and type your password to continue.
Step 4: Choose a system image backup.
Step 5: ClickNext, thenFinish.
Method 6.
This operation will back your rig to the state where no software is installed.
And you might choose to keep your personal data or remove them, thats up to your requirements.
Now, I will guide you on how to reset your PC.
Step 1: Still get into the Windows Recovery Environment first, then go toTroubleshoot.
Step 2: SelectReset this PC.
Step 3: ChooseKeep my filesorRemove everythingfrom the pop-up screen to continue.
Related post:Windows 10 Reset VS Clean Install VS Fresh Start, Detailed Guide
Method 7.
Note that the latter method might remove everything on your PC.
Therefore, it is necessary toback up filesin advance.
To do this work, you need the help of reliable backup software.
It is a powerful tool in possession of multiple features.
It enables you tobackup Windows 10,backup data, andclone HDD to SSD.
Lets back up your PC with MiniTool ShadowMaker to avoid data loss in case of unexpected system failure.
Step 2: Navigate to theBackupsection and you will see a screen showing source and destination.
Step 3: Choose a backup source by clicking on theSOURCEsection.
After you determine the source, clickOKto continue.
Step 4: Choose a target place by clicking on theDESTINATIONsection.
Then clickOKto return theBackupscreen.
Step 6: Wait patiently until the backup process is completed.
you’re free to go to theManagesection to check and manage your backup tasks.
Hope one of them at least can help you out of trouble.
MiniTool ShadowMaker can be a useful assistant in data recovery.
it’s possible for you to try it out confidently.