Remove virus from computer / PC manually

How to remove virus from your computer and USB drive or hard drive ?
Here the trick
Open star menu->>Accessories->>Command Prompt and type the drive letter that you to clean from virus and hit enter
example
type d: enter
cmd command promt display
D:\>
Type dir/w/o/a/p enter
You get a list of files and now you can search if anyone of the following do exist:
RVhost.exe
Ravmon.exe
info.exe
Iexplore.vbs
Autorun.inf
New Folder.exe
and any other files with .exe or com extension, if you find any one of the files above and other files with .exe and .com extension
please delete the files using the command below
attrib -h -r -s -a*.* and hit enter

Now delete each files
Example del info.exe, that's it.
When you do this step, your drive free from firus files. and try scan your drvive with anti virus software.
You can clean all your drive with this metod.

Clean dust from your computer

Why clean dust from your computer. It’s important to know that cleaning dust from your computer can extend your computers life drastically and make it running faster and quieter especially if you’re using the computer a lot.
In desktop computers the dust typically accumalates in or around the CPU unit and fan areas of the computer. There is typically a fan connected to the heat sink which is attached to the processor of your computer in order to prevent it from overheating. This will blow air onto the heat sink to cool down the processor. Since the fan is constantly blowing air it also ends up blowing dust particles in the air into the heat sink and over time this can accumilate with dust and overheat your computer causing serious performance issues with your computer. The dust may cause your fan to blow faster which makes it louder and more costly for your computer to run as well as making the computer have to do more work than it should. You should be able to see if the fan is clogged by opening up the side of the computer and looking at it to see if the heat sink is full of dust and dirty looking. If so, it may be a good idea to give the computer a good cleaning. Make sure you are unplugging any electrical power devices when opening the computer or doing any cleaning.

How to clean the dust from your computer

When cleaning your computer it really can help if you have a can of compressed air and a special nozzle. These can typically be bought from any computer store. The spray nozzle is helpful for getting into those tricky places. When spraying the compressed air on to your computer, make sure you don’t spray it for too long as condensation may form some drops of water. After blowing away any dust from your computers heat sink, try wiping it with an anti-static cloth if you have one. You could also try using a straw for cleaning the dust. Along with your compressed air you can additionally clean your power unit and keyboard.
Cleaning dust from your computer isn’t a lengthy or difficult task as long as you’re able to obtain the proper tools. It’s really worth it and you’ll notice a great improvement in your computers performance. Additionally with the dust being cleaned from the fan, it wont need to use up as much energy and blow so hard so it will be quieter and with the processor not being stuffed with dust should be running at a better temperature and your whole computer should be running a bit faster. It’s highly recommended that your try to clean the dust from your computer atleast once every 6 months.

Source : http://www.techescape.net/2011/01/08/help-with-cleaning-dust-from-your-computer/