Computer runs extremely slowly (java.exe problem)

A computer runs extremely slowly. I checked the processes, and found there were dozens of 'java.exe'.

I killed all of them, the computer runs fine now.

I think that when I restart the machine, the problem may happen again.

Solution: 

Install and run Windows 优化大师. Scan and fix all the problems. The computer runs fine now.

How to find the IP address of a printer?

Use Total Network Inventory software, or Advanced Port Scanner.

How to detect the model number of a network card?

Use CPUZ software.

Or, it seems that 驱动之家 is a better software.