U disk repair system method after Win7 system crash

Nowadays, users who use Win7 system have occupied the vast majority. Although Win7 system has been stable, it does not mean that there is no problem. Sometimes it will be due to software or its own operation. Some system files were accidentally deleted, causing the system to fail to open. At this time, if your computer does not have a CD-ROM drive, you can only use the U disk to operate. You usually think of using a USB flash drive to reinstall the system. In fact, the U disk can also be used to repair the system.
Method 1: Download a Win7PE, put it in the U disk, extract the installation version of the ios file to the U disk, boot the PE directly after running setup.exe (repair boot tool) to repair, this is the simplest U disk repair system method.
Method 2: Download a dual-system boot boot file on the active partition, that is, the boot file can be repaired and repaired in the system. If it can't be repaired, it will be abandoned. Otherwise, if the chipset is different, it will be the same. There are blue screen and other issues.
Method 3: If your system is missing system files, you can copy related files from other computers to the U disk, and then start WinPE from the U disk to copy them into the Win7 system, avoiding reinstalling the system.
The above three are relatively simple to use the U disk to repair Win7 system method, if it can not be repaired successfully, then choose to reinstall the system with a U disk, this is the most versatile solution, but when reloading Be sure to remember to store the important data of the C drive on other hard drives, including desktops, favorites, my documents and other important places.