Mfc71.dll, mfc71u. dll, and msvcp71.dll in qtp

Many of my friends found that their hard drive root directory contains three files: mfc71.dll, mfc71u. dll, and msvcp71.dll.
This is actually installedQtpGenerated after 9.x-these files are the VC 7 Runtime library files, and many common software cannot run without them.
Some of my friends thought it was a virus and deleted them directly. As a result, when qtp was opened again, the dialog box in appeared, asking you to reinstall qtp.

Now that we understand this, we can see this dialog box again. Do you know how to handle it and how to avoid it?