There are some days when this computer works slow

are you installing from terminal window if so use the word sudo in front of commands.

See if it is any better at going backwards when it is cold (like right after you start it for the day). If it works better than normal, the transmission may need rebuilding (not too many people know how to do this though).
Before giving up though, check under the transmission between the tires. There may be one or two small fans that are supposed to cool the transmission case. These can get clogged with grass and either jam, slow down, or simply be unable to move air effectively. SOmetimes cleaning these (if you model even has them) can make a difference.

mcdevito75 here, Many things can slow up yours or any internet, Try this, from your desktop, click on RE-CYCLE bin and emty it, form your home page, right click tools (top of page) now cerefully, CAREFULLY read every word and delete cookies, and other items you really don"t need right now, check the box next to each item, READ EVERY WORD BEFORE DELETEING ANY THING. After this, from your home page, type in search, Super Anti Spy Ware, they have a free version that I run every day to get rid of potential viruses and internet ads that slow up your computer, READ EVERY WORD BEFORE YOU DO ANTHING. If your not comfortable with doing these things with your computer You may be new to doing these computer functions, then from Start, lower left side of screen, click start, the Help and support, they too can help with internet speed. READ EVERY WORD BEFORE DOING ANY THING WITH YOUR COMPUTER.

Common problem in the 73/93 is poor soldering works in the Lamp assemblies. See pictures here:
http://s807.photobucket.com/albums/yy352/budm/Sony%20SDM-HS73/
You should also inspect the inverter board also for loose connections.

format the pen drive after taking the backup and then defragmented it you will get smooth work in your pen drive. If not so fast after defragmentation then check your computer configuration and its space may be it is due to your computer is slow you con check whether your pen drive is ok or not by connecting it to any other good pc. good luck

And please vote me and rate me..

then delete all your cookies and temporary internet files
scan your computer for virus...

Are your internet provider has its own MODEM. Because this might be a reason why your connection is slow. Particularly its rerouting your connection into double path so you have to get the Registered IP Address on your internet provider then only use your New Router itself to give relay on data. Good luck!

Hello Sis,
I guess your computer has a big problem with a virus which your anti-virus wasn't able to detect. If I were you, I will back up all my files on a separate drive then format your computer. This crazy problem already happened to me and what i did was the one i just wrote to you. If you don't have the actual drivers for your computer, go back to the place where you bought it from and ask for the drivers then you can format your computer by yourself. If you are not able to do it on your own, consult anyone who is able to do it for you.... Godd Luck Sis !!!!!! Good Day !!!!!!

I would inspect the running processes on this computer. It most likely has nothing to do with your keyboard.

try this
http://technet.microsoftware.com/en-us/sysinternals/bb896653.aspx

it's a free tool from MS to inspect them.

It sounds like you've already started doing some things that can help you discover what is causing this problem, and that's good, but before I offer any more ideas, can you please tell me two things:

1. How much RAM (memory) does your computer have?

2. How much total hard disk space does your computer have, and of that, how much is available?