Recently, my laptop has been acting up for no apparent reason. It takes a very long time to boot and run—often 2-5 minutes just to open necessary network connections, pages, QQ systems, and other things. This waiting is absolutely maddening and unbearable, so I finally decided to take action and try to optimize and speed up my laptop. After doing a bit of research and combining it with some advice from more experienced users, I found that the reasons for slow computer startup and operation are roughly as follows:
A. Too many programs set to load at startup;
B. Too many disk fragments;
C. Virus infection;
D. Bad sectors on the hard drive.
There are several comprehensive solutions to address these issues: