There are various reasons why Windows does not start. The first assumption is a defect in the boot environment that prevents the system from starting. However, causes can also be a defective file ...
Windows 7 will not start? Use Safe Mode, Startup Repair, chkdsk, and bootrec to restore your PC without reinstalling.
If the Windows key is not working properly on your keyboard, there are several things you can do to troubleshoot it.
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