Problem with my system

****a piece of Scotch tape over a mouse's laser, might make it work perfectly******
***some optical mouse's need a mouse pad and some work
on any surface.***
i use a lot of computers that have mouse's that i have to
list it slightly and let them ride on a finger when they are
off the mouse pad.
a few weeks ago, my good mouse finally frayed its cord and i
had to start using one of my redundant mouse's that needs a
mouse pad.
i noticed immediately that it could work almost normally if
i lifted it 1/4 inch off the table.
I'm not going to deal with this like that though..
i speculated that it must be because the laser sensor is too
sensitive..( since it works better from farther away....)
i wanted to try to put a piece of scotch tape over it to
act as a diffuser to make it less sensitive, but i was too
busy. lol. so like a month later . i finally tried the tape
idea, and it works perfectly!!!. dam
if you get an optical mouse that goes crazy without a mouse
pad, you should try this

Sounds like either there is a bad connection from the computer to the monitor, or the monitor has a faulty power regulator, causing the monitor to overheat prematurely, and shut off.

It Could be because your laptop is infected with Virus . Due to Virus your Explorer.exe File was corrupted. If now computer is all right after restoring then I'll suggest you to use Good Antivirus Program and regular update it and Scan your Window Regularly.

Without looking at the monitor to confirm this, I suspect you have failing capacitors which power the HT circuit, simply, the power needed to light the display, is leaking to earth, capacitors have lost the ability to store the charge necessary to illuminate the screen, which is why it is working erratically.
You need to get this checked out by a TV technician.

obviously not a mechanic
with bad sensors you would have starting and noticeable engine running problems
have the fault codes read by an accredited service center and check the EVAP system

The high pitch sound is coming from the inverter. It is faulty and needs to be repaired or replaced. The inverter supplies high voltage to the CCFL lamp, this lamp gives the backlight to the LCD so you can see the LCD images.
Check out LCD parts for parts, service and DIY info. use this link :-
www.lcdparts.net

if your mouse have a ball inside you can clean the roll inside sometime dust on it and do not rotate

Here we go, this is the best way to avoid reinstalling duplicate hardware, which we have all done at one time or other. You need to get to the device manager, start, settings, control panel, system, device manager , hardware, now you will see everything installed in your machine, if you see duplicates for the mouse and keyboard remove them, if no yellow marks in the device manager, uninstall both the keyboard and the mouse, when uou reboot, it will have a pop up in the system taskbar that says, found new hardware, and then it will say installing the software for your new hardware. If this doesn't work then we need to go into the "install hardware" also in the control panel, but that should do it, I am giving you a lot of info, but sometimes we can't find you again until a day or two later so I want you to have all possible inf before you start. Also the easiest way of all is this. If the computer was working yesterday or last week, we can do a system restore thus restoring it to a time when everything was ok and everything was working, this is Start, accessories, system tools, system restore, pick the day from the choices shown on the calander and sit back as it restores your machine back to a working computer, have a good night and good luck,Gym

start your computer then press f8 to go to advance boot menu then select enable vga to boot. when you get to log in and get your screen try to reinstall the video driver

your system may be infected with viruses, so that it becomes busy running the virus, Try installing an antivirus.

Otherwise reinstall Windows.. if you can arrange a seperate mouse then connect it to the machine and see the mouse working well, replace the mouse.