What are the system recovery options in Windows 7?
Do a System Restore in Safe Mode.
"How to Do a System Restore in Windows 7":
http://www.sevenforums.com/tutorials/700-system-restore.html
"Advanced startup options (including safe mode)"
"The Advanced Boot Options screen lets you start Windows in advanced troubleshooting modes. You can access the menu by turning on your computer and pressing the F8 key before Windows starts (Tap F8 at the rate of about once per second)"
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If that does not fix it, follow this method:
Often a Start-up Repair, etc. disk will work where the built-in Repair Software won't
Make your own System Repair Disk from the information in this Tutorial:
"How to Create a Windows 7 System Repair Disc"
http://www.sevenforums.com/tutorials/2083-system-repair-disc-create.html
"This will show you how to create a Windows 7 system repair disc to be able to use to boot to **system recovery options** to help recover your Windows 7 installation if you don't have a Windows installation disc, can't find your Windows installation disc, or can't access the recovery options provided by your computer manufacturer.
A system repair disc is not able to install Windows 7.
Note
If you are unable to boot your Windows 7 to create a Windows 7 System Repair Disc, then you could create it on another computer to use on your computer."
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Then use that Disk for the System Recovery Options:
"System Recovery Options"
http://www.sevenforums.com/tutorials/668-system-recovery-options.html
"How to Run a Startup Repair in Windows 7"
http://www.sevenforums.com/tutorials/681-startup-repair.html
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But if you do not have access to another Windows 7 machine with the same "bit" version use this method to make a disk, from which you can also use the Startup repair options:
You can use this for preinstalled OEM or Retail Licenses
Download the correct ISO file and make your own disk and use the Product Key that is on the COA Sticker.
Download: Windows ISO Downloader.exe
Version: 6.00
Release Date: 11 April 2018
Requirements: Windows 7 or newer, .NET Framework 4.x, Internet Explorer 8 or newer.
Important: As of Version 6.00, we're adding back an experimental feature to generate links for Windows 7 and Office 2010. Generation of new links for these products is throttled, and not every download is always available in every language. New links are generated on a first come first served basis, with users who enable the idle resource donation getting preferential treatment. If you have further questions, please use theWinCert Forum to get in touch, so that other users can also benefit from the discussion.
And here are instructions on how to burn ISO images to disk:
http://www.snapfiles.com/get/ISORecorder.html
You change the Boot Order in the BIOS to be able to boot from your installation media:
How to Boot Your Computer From a Disc or USB Drive
:
Cheers.