It is known to all that the Disk Cleanup utility can help us delete the useless system junk files to release more available hard disk space and then optimize PC performance. But there are some tips that needs to be paid attention to when cleaning up your system.

First, please remember to regularly clean up your system.
When browsing the websites or downloading/installing programs on the computer, some files will come together like Internet temporary files, which make no sense but just waste hard disk space. So the Disk Cleanup tool is needed to clear up these useless files. Here is what you can start: go to Start -> All Programs -> Accessories -> System Tools -> Disk Cleanup. If you have more than one drive, please clean them one by one. Besides, a disk defragmentation can not be missed after deleting the files because this will make all files on the hard disk gather close together and then improve disk visiting time

Second, periodically clear up Windows registry.
The same as Internet temporary files, when windows system and other processes are running, some registry items are generated and rewritten inevitably and constantly. Normally these entries will overload the workload of the system and then cause system slowdown, freeze-up and crashes. So a deletion of these invalid and useless registry entries is a must to optimize PC performance. But if you are not professional on computers, please go to depend on a registry cleaner and remember to first back up the registry before the cleanup.
 
Third, try not to log in system as administrator
When copying and pasting files to the computer from a outside device, if you are logging the system as an administrator, some spyware or malicious software will come easily. So you’d better to log on your computer with a common user.

Fourth, carefully install programs on your computer.
We know that programs on the computer will take lots of hard disk space. And sometimes, some programs will automatically load some entries when starting up the computer which significantly affects PC performance. So you should be careful enough when installing programs on the computer and delete the useless one immediately once it is not used any more. In this way, your can not only release more disk space, but also regain faster computer speed.

Fifth, Remember to always update anti-virus/ spyware programs.
Once a computer is infected by virus or spyware, lots of system sources will be taken when booting up the computer. This will greatly slow down computer speed. Seriously, they will spy out system data and steal users’ privacy. So please remember to turn on the real-time safeguard of your anti-virus / spyware programs to block this potential risk, and update them when available to always enjoy the latest virus database.

Above are tips that you should know in cleaning up Windows system to optimize PC performance. Though they seems rather simple, please do not miss none of them when trying to optimize your computer.