Hello Jack,
Thank you for posting your query in Microsoft Community Forum.
I would suggest you to boot the computer into Safe Mode and check if you can boot.
Please follow the steps below:
- Restart your computer if it is powered on.
- Tap the F8 key after your computer initially powers on.
- Once you see the Advanced Boot Options menu you can stop tapping.
4. Use the up/down arrow keys to highlight your selection.
- Select Safe Mode and press Enter.
- You should see drivers loading, and then please wait.
- You should then be at the Welcome Screen.
- Logon to your computer using an account with Administrator privileges.
You may refer to: **Start your computer in safe mode**
Once the system boots into Safe Mode, try restoring the system and check if it helps.
Please follow the steps below:
- Click Start, type system restore in the Start Search box, and then click System Restorein the Programs list. If you are prompted for an administrator password or confirmation, type your password or click Continue.
- In the System Restore dialog box, click Choose a different restore point, and then click Next.
- In the list of restore points, click a restore point that was created before you began to experience the issue, and then click next.
- Click Finish.
You may refer to: **How to repair the operating system and how to restore the operating system configuration to an earlier point in time in Windows Vista** (holds good for Windows 7)
You can also try S tartup Repair.
Refer to: What are the system recovery options in Windows?
Hope this information is helpful. Please do let us know the result, we’ll be glad to assist you.
Thank you.