Win7 fingerprint login has been waiting for solution

It has been several days, and somehow I can't log in with my fingerprint. I have been waiting to show it. Wait until N is long. Please wait. Before I can't use it, I remember that I only used 360 to disable several automatic startup items. I remember that it is a sql database and mySql database. I feel that these two are useless.
I have been waiting since then, and I have not waited for the past few days. So I gave it a ban and found that I still have to wait. It is not a service.
Then google, they actually said that the T400 had this problem, and occasionally can not normally fingerprint login, but I have been unable to. And also said to install a piece of software, think about it or forget it. I heard that it may be that the driver is broken, I went to the device manager and looked at it.
I rely on, my PCI and fingerprint driver turned out to be an exclamation mark. It is a question mark. In other devices, … this is because the driver is broken. This is no driver. How can this be used?
So find my driver installer, install → restart, get it!
I hope you will help you when you encounter this problem in the future, first look at whether the driver is intact, if it is normal, then install it again. test.