Sounds like you just need to replace the keyboard. You can get a replacement at Walmart for less than $15.00. Trying to clean it is not recommended as cleaners can cause damage to the insides.
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Compaq Presario computers provide users with a row of
function keys for added keyboard functionality. Function keys can serve a dual
purpose as well.
Function keys are located at the top of Compaq Presario
keyboards.
By learning how function keys work on a Compaq Presario you
can take advantage of time saving keyboard shortcuts.Purpose
Use function keys to access menus, save changes and create
shortcut keys.
Various applications, including Microsoft Office, allow you
to select a function key as a shortcut key for running specific tasks. These
settings are usually found under the Tools, Settings or File menu.
Each Compaq Presario computer has twelve function keys.
The most common used keys are "F2,"
"F8," "F10" and "F12."
The first three are used mainly to access and use the Compaq
BIOS. "F12" is used to access a set of run from options during the
boot process.
How to Access
Access function keys on a Compaq Presario by pressing any
of the keys on the top row of the keyboard. Access the key's dual purpose by
first pressing the "Fn" key located on the bottom row of keys.
Use function keys as shortcut keys by pressing them anytime
while in the desired application. Remember, you must set them as shortcut keys
first.
Note that some programs may already have certain function
keys set as shortcuts.
Open menus and view the shortcut keys beside each menu item
before setting your own shortcuts.
Dual Uses
Each function key has a dual use. Press "Fn" plus
the desired function key for the key's other use.
Below each function number is a small picture within a
square or rectangle.
This dictates the dual use. "F1" opens help and
support. "F2" serves as a printer shortcut.
Open your homepage by pressing "F3."
If you use dual monitors, switch between monitors by using
"F4." "F5" puts your computer in stand-by mode.
Quickly lock your computer by pressing "F6."
"F7" and "F8" adjust the screen's contrast.
Play and pause your music in Windows Media Player or other
default media player by using "F9."
Press "F10" to stop playing media. Skip ahead or
rewind media by using "F11" and "F12."
Other "Fn" Keys
In addition to function keys, the "Fn" key is also
provides other keys with a dual use.
Any key with a small square on the key has a dual purpose
such as the "scroll," "insert" and "delete"
buttons.
Since laptop keyboards have no number pads, certain keys
serve as the number pad by pressing the "Fn" key.
If you have had to re-establish the operating system in your Compaq, you've probably lost the programs for the special keys that are often present on laptops.The special driver programs should be available for free download on Compaq/HP's website. Installing the drivers may require reinstalling the OS, also. If you're talking about regular typing keys that are bad, you probably need a new keyboard. Search the Web and eBay for your exact model and "keyboard."
probably you have missed the uxtheme.dll file, press windows key + r type in sfc /scanonce and insert origninal vista dvd , after restoration reboot and you will have your shiny theme back
First check to make sure that you're wireless internet is turned on. Sometimes there is a button to push above the keyboard and others it is an FN key combination. If that does not work then go into Device Manager. Look for your wireless adapter, if there is a yellow! or a Red X, then right click on it and update driver. Finally, in Device manager right click on your wireless adapter and do a driver rollback. This will uninstall the new driver and give back your old one, if your old one was working. Repost after you tryed those three options.
you're gonna have to run through all of the keys, but start with the function keys first, F1, F2 and so on. It's almost certain to be one of those. Also, you should probably take out the motherboard battery for about 20 seconds or so to clear out certain settings in the bios.
If you can remove the keyboard from the laptop you can try cleaning the back of it with a que-tip and a small amount of rubbing alcohol. Most likely it will need a replacement keyboard, or you could plug in a desktop keyboard so you can at least use the computer until you get a proper replacement.
If you post the laptop maker and model number I can try to help you further.
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