Memory failure caused restart, software installation error, and file loss

I encountered a strange phenomenon today, the computer can be turned on, pe can go in, and copy the image file successfully. During the installation process, copying the files is fast, but the c drive is found to be not completely copied; the installation software often reports errors, and the errors reported each time are different; when verifying the md5 value, each time is different.
Finally, after excluding a long time, it was concluded that it was a memory problem.