What are the risks of installing the Win10 Technology Preview?

Microsoft announced Windows 10, and released the Windows 10 technology preview version of the download, presumably some technology enthusiasts have downloaded or are downloading. Remind everyone before installation, it is best not to overwrite the installation on the work machine, after all, it is still an early test version, there are some unknown problems, may accidentally crash, resulting in your file loss. So, what are the risks of installing Win10 Technology Preview? The following is a description of the risks that exist when I install the Win10 Technology Preview.

install Win10 technical preview What are the risks?
About the risk of installing Windows 10 Technology Preview, Microsoft officially said, "This software is still under development and may have certain risks." That's why we recommend that you not install the software on major home or business computers. Microsoft recommends that you back up everything because of the following risks:
1, unexpected computer crashes and file loss.
2, the software cannot be installed or not working properly, including anti-virus programs or security programs.
3, printer, video card or other hardware does not work.
4, access to the company or home network encountered difficulties.
5, some files are damaged.
In addition, if there is a problem with your computer, Microsoft is likely to check your system files. If you are concerned about system file privacy, Microsoft recommends that you consider whether you want to use the technology preview or consider using a different computer.
Postscript: I believe that the installation of Win10 technology preview is only suitable for simple understanding, suitable for office learning. For some users who have never installed the system, it is best not to install it. Please install it by professionals.