The computer goes into the system slowly and the computer always freezes.

Problem:

A client of a computer for several years useless, after the boot, the system is very slow. When you enter the system download software, suddenly panic. Start to think is improper operation, restart the computer, into the system, download the software, there is a panic. It turns out that even if you don't download the software and open other applications, the computer crashes.
Answer:
Suspicion is the heat dissipation, open the chassis, with the hands of the CPU radiator, the feeling is not very hot, it seems not the problem caused by heat dissipation.
Suspect is not the hard drive has bad, shut down, plug in the boot U disk, boot, u disk reboot system, using the U disk on the MHDD HDD Detection Tool, scan hard drive, no bad way found.
Hard drive does not have bad, according to always frequent panic, determined that the system is a problem, it is likely that the virus mischief.
Reload system, completed, the computer into the system speed significantly faster, and no longer panic phenomenon.
Summarize:
The computer frequently freezes, first, examines the computer installs the anti-virus software to be too many, causes the conflict. Generally a computer only installed an anti-virus software.
Second, open the chassis, check whether the CPU heatsink is hot, if hot, it may be bad heat, the CPU fan dust cleaning, or replace the radiator;
In addition, is scanning the hard drive to use bad way, commonly check hard disk tool: Mhdd,hd tune.
Finally, the above checks are no problem, it is likely that the system has problems, reload the system.