Sometimes, Windows 7 won't boot, just because of improper overclocking. To solve this problem, you can disable the overclocking. If you use software for overclocking, uninstalling the program can solve the problem. If you use BIOS settings for overclocking, please refer to the following brief tutorial to disable it:. Is Overclocking Safe? Whether to Overclock or Not? Look Here. Here are 3 ways to access Startup Repair:.

If the Startup Repair can't solve the "computer won't boot Windows 7" problem, you can try other Windows 7 repair tools. If the RAM bar has something wrong, the Windows 7 also won't boot.

Please check memory for errors. Please pay attention to its Status to see whether there are errors detected. If it detects errors, you should search online for solutions, or you should replace the RAM with a new one. If some system files are corrupt, causing Windows 7 not to boot, you can use SFC command to repair these system files. Here is the guide:. Sometimes, outdated drivers may not make CPU and devices like hard drive, RAM, and other parts communicate smoothly, cause "Windows 7 won't boot" problem.

In this case, you can update these drivers to solve this problem. MBR Master Boot Record is the first sector on the hard drive accessed by a computer in booting process and it records the relevant information about the hard disk itself and the size and location information of each partition on the hard disk.

If MBR is corrupt, Windows 7 won't boot, too. In this case, you can rebuild MBR through commands. Then, you should run the following commands one by one. If all above methods don't work for you, you can use this method. The problem is that you may haven't created a system restore point or a system image. You can read on and follow the specific steps below.

If the cloned hard drive does not boot, you need to check whether your drive is properly connected to your computer. If not, reconnect the hard drive to your computer internally instead of externally so that the disk can be organized by the computer correctly.

You need to check if you have set the cloned hard drive as the first boot option in the BIOS, especially when you have multiple hard drives on your computer.

The steps are below:. Step 1. Step 2. Find the boot menu and set the cloned hard drive as the first boot option among all the devices. Different partition styles and incorrect boot modes can also result in the drive being cloned but won't boot successfully. The source and target disks must be the same type.

You can check the disk type by following the steps. Open Disk Management, right-click on the source disk, and select Properties. The cloned drive will not boot in the wrong boot mode. You can follow the steps below to set the correct boot mode.

Then press Enter. A corrupted boot record can also interfere with the normal booting of the cloned disk in Windows 7. In this case, you can repair the boot record to solve this problem. Recover Windows 7 from a serious error. These tools can help you get Windows 7 running again. Note: If you use a Tablet PC or other computer with a touchscreen, you might need to attach a keyboard and mouse in order to use Startup Repair and other tools in the System Recovery Options menu.

Turn on your computer, insert the Windows 7 installation disc or USB flash drive, and then turn off your computer. When the Install Windows page appears, click Install now to begin the installation process or click Repair your computer to access system recovery options.

If the Install Windows page doesn't appear, and you aren't asked to press any key, you might have to specify that your computer uses its DVD drive or a USB flash drive as the first startup device. Note: Most newer computers can start from a USB device, but some older computers might not have this capability.

For more information, check the documentation that came with your computer or go to the manufacturer's website. Before you change BIOS settings, check the information that came with your computer or go to the computer manufacturer's website. Specific procedures for accessing the BIOS and changing settings can differ depending on your computer's manufacturer, or you might be able to choose which startup device your computer uses without changing BIOS settings.

The BIOS interface is designed for advanced users, and it's possible to change a setting that could prevent your computer from starting correctly. Turn on your computer, insert the Windows 7 installation disc or USB flash drive, and then restart your computer.

Newer computers often display a startup or boot menu. Procedures vary depending on the BIOS manufacturer. Usually, you must press a key such as F2, F12, Delete, Esc or a key combination immediately after you turn on your computer but before Windows starts. But that does not necessarily mean that the hard disk itself is broken. The cables might not be an issue. There are many aspects of the hardware that might cause your hard drive to be malfunctioning.

This is why physical repairs are best left to a professional. Instead of trying out DIY techniques that can completely destroy your disk, you should contact a professional hard drive repair service.

Some external drives come with their own separate adapter, which needs to be plugged in first. Others have multiple USB plugs, each of which needs to be slotted before it can draw enough power to function. Another reason might be incorrect drivers. This is usually not an issue, as most disks run fine with the default windows drivers.

But in case your drive refuses to show up, try updating your drivers. If neither of these suggestions works, try an HDD management tool. Software like this can usually access even unformatted drives, allowing you to format them properly and then access them. Sometimes, the issue stems from a wrong file format from another OS, and you just need to create a new partition to use the drive. Conclusion Different software takes varied approaches to hard disk repair.

Some applications focus on diagnosing the problems and detecting them before it becomes too late. Others simply scan through the drive to locate bad sectors and attempt to fix them. If the issue is booting, a partition manager is all you need. But if the whole disk is corrupted, you need something more powerful.

Or instead of trying to figure out the root cause yourself, you can just choose a general-purpose tool like Disk Drill to recover your data. No matter what the problem with your hard drive is, you will find an application to repair your disk on this list. A frontend developer turned writer, Levin brings his in-depth knowledge to bear in breaking down complex technical topics into a layman's perspective. A believer in emergent technologies, Levin writes about Machine Learning and Internet-of-Things to explore how people and businesses can benefit from innovation.

He also likes going into the nitty-gritty details of software or hardware products to bring an unbiased review that adds value to his readers. Andrey is a software engineer expert with extensive expertise in data recovery, computer forensics, and data litigation. Andrey brings over 12 years of experience in software development, database administration, and hardware repair to the team. Press ESC to close.

Table of Contents. Whatever the problem, you need a way to rescue your drive and recover all the important data. A good HDD repair software is your best bet. Before moving on to our complete ranking, here is a quick recap of the best hard disk repair tools.

Pros Recover data from corrupted sectors Read S.