@UNLEASHED
After you had completed updated your anti-virus, then open your anti-virus by double-click of your anti-virus icon from the taskbar that will prompt you new opening window dialog to hit 'SCAN' button being scanning entire your computer.
It takes time to be scanned ENTIRELY roughly 1-3 hours depend on how much hard disk drive (HDD) space you used. DO NOT USE COMPUTER/ACCESS INTERNET while being scanning!!! If it is small HDD space, then it will take less than 1 hours; otherwise for largest HDD space, then it will take more hours to be scanned.
Once done anti-virus scanned completely- - -it will tell you if there is any virus detected is found or not, next step, if none of virus detected is found, then follow the steps at below:
1. click
START button,
2. click
ALL PROGRAM, to select
ACCESSORIES3. under
ACCESSORIES, select
SYSTEM TOOLS, then select
DISK CLEANUP.
4. wait it calculates how much space you will be able to free space. Then it will prompt new opening windows of
DISK CLEANUP for Drive C:.
5. You will see that tells you how much space disk on Drive C: to be free up. Be sure mark
all CHECKS of files you wish to be cleaned up unnecessary/unwanted/useless files on your machine.
6. Hit
"OK" button. Wait it prompt cleaning up all files. And hit
"YES" to accept performing these actions.
7. Wait until it complete disk cleanup to be disappeared itself.
THAT'S IT! 
**** If you prompted virus detected is found after scanning, please write down what the name of viruses you have and let me know to give you step by step how to remove virus. Remember there are over one million viruses out there. ****
Good Luck @UNLEASHED!
P.S. how often you should use DISK CLEANUP and SYSTEM SCAN (anti-virus), depend on how much you use computer access. If it is everyday computer use in 24 hours in 7 days, then it should be either every week or every two weeks.
If it is rarely computer use, then it should be every month or every 3 months.
It helps keeping your computer system performance cleaned and faster avoid being cluttered or slow down!!!