What I want to show you here is the installation of database software sql2005. I used XP when I was at school, and it was easy to install. In win 10, I always prompt for a digital signature, so I can't install it. Let's see how to solve this problem.

Click the Start menu, then hold down the SHITF key, click the power button, select Restart, and remember to hold down the SHITF key on the keyboard.

After restarting, you will enter the interface shown in the following figure, and then select "Troubleshooting", that is, click the contents in the red box with the mouse.

After troubleshooting, select "Advanced Options" as shown in the figure below, and the method is the same as above.

Next, you will see the interface shown below, and select "Start Setup". (The method is the same as above)

Next, we can see several options (as shown below) and then click Restart.

After the restart, we can see many special startup mode options. Press the number key 7 to select "Disable driver forced signature" and it is ready.

Now install directly after entering the system, and the prompt shown in the figure below will appear. Click the contents in the red box to install.