Now of these days are polluted with spammers,Computer viruses ,malwares and keyloggers etc.Only with anti virus program your computer is not fully protected.You should need other programs and have to run at east once in a week to remove malwares,virus,unauthorized registry changes and temporary files sometimes like 5Giga bytes temp files.
How maintain health of your computer and working like a new machine.Also protecting your self from virus,malware ,registry alteration.
1)Simple thing First please do
From START> PROGRAMS> ACCECERIES> SYTEM TOOLS > DISK CLEAN UP
Then please do a disk defragment from START> PROGRAMS> ACCECERIES> SYTEM TOOLS > DEFRAGMENT
Disk clean up make to remove temporary files and Disk Defragment makes to keep the files in order and save the disk space and call the files faster ,when we click any programs.
2)Download system mechanic from http://www.iolo.com/downloads.aspx
this is a great program that i am using since 10 years.Its remove all unwanted virus,maleware etc from 2 clicks.This is freeware with limitations
3)Download CC Cleaner from http://www.piriform.com/ccleaner this a fully free program.Its also do the same like above but with limited features.
4)Download Advanced system care from http://www.iobit.com/advancedwindowscareper.html .This also free with certain limitations.
5)Download Registry mechanic from http://www.pctools.com/registry-mechanic/
This is also a great program to fix registry changes from other websites mainly spam websites in local computer.
6)Last of all very important Always clear private data from web browsers,especially if you login to banking websites and important emails .Because this data can send to remote spammers,while they trick with clicks like "YOU ARE THE WINNER OF 1,000,000 POUNT" etc message windows.