Acer V5-47 1 originally belonged to win8. If you want to change to win7, enter BIOS from the settings, modify the boot, restart the black screen, and press F2.

Hello, thank you for choosing HP products. According to your description, I suggest you refer to the following information: HP hp450 notebook U disk can be started by pressing F 10 to enter BIOS, selecting bootorder in bootoptions under systemconfiguration column, and moving the cursor to "USB Desktop /USB Hard Disk". Press keyboard F6 to adjust this option to the top of the list, and then press F 10 to confirm the setting. Press F 10 again to select Yes to save and exit, which will automatically restart and then access the USB flash drive to try the operation. The following legend: Under the pre-installed windows8 system, it is recommended to burn the recovery CD first to recover the pre-installed system. After reinstallation, the one-button recovery function of the pre-installed system F 1 1 cannot be recovered. The method of creating a system recovery CD is as follows: Press win+Q in windows8 system, call search, enter Recovery, select recoverymanager on the left, and then select the option of creating system recovery media in the upper right corner of the window. When prompted by the software, access the USB flash drive or place the CD, and then follow the software prompts. To replace windows7, you need to enter BIOS modification boot mode. The boot mode of windows8 system is not completely consistent with that of windows7 system. Select the bootoptions option under the systemconfiguration column, and select the LegacySupport column as Enable. SecureBoot option is disabled. Press the F 10 button to select Yes to save the settings and exit. Pay attention to the screen prompts when restarting the machine. If there is a word or value +ENTER, enter the information or value in brackets and press enter directly. There are no other prompts when entering. This operation can ensure the operation of LegacySupport option in the previous BIOS. When installing windows7 system, the notebook needs to be booted with genuine system CD, and the notebook uses the serial hard disk corresponding to Intel7 series chipset. Windows7 system is unprotected, and SATA hard disk can be loaded through U disk when the system is installed, which runs smoothly and stably. The download link of the hard disk is as follows: FTP://ftp.hp.com/pub/softpaq/sp56501-57000/sp56722.exe runs on any other computer, releases the program to the default path C:\swsetup\, and copies the SP57622 folder to a USB flash drive; When installing the Windows7 system to the selected partition, insert the U disk into the USB2.0 interface on the right side of the notebook, click the "Load Driver" item, and select the files in the drive under the sp56722 folder on the U disk. If win 732-bit system is installed, you need to load the contents of x32 folder, while win 764-bit system loads the contents of x64 folder. I hope the above reply can help you.