Can a virus turn off a computer?

[jnero]

My computer will cut off some times in windows only. No warning other
than my drives will light up and then it just shuts down.

It does not do it in dos mode. I have tested the memory and replaced one
bad module, "thanks to some one here suggesting that I had memory
issues"

I ran a memtest in dos and I can do a virus scan in dos and the computer will
run forever. I can't do a full virus scan in Windows because it will shut off.

I have several Trojans and worms. For some reason I thought Avast would remove the virus but I see now that I need the professional version for removal.

It puts these viruses in the chest but they continue to open up and add them.
Due to finances I am unable at this time to purchase pro.

Will it actually clean all these Trojans and worms "pro" or will I need to do a complete reformat and reinstall every thing.

Will this resolve my issues? Please advise?

[xistenz]

Sudden reboots may be caused by a faulty or weak power supply.

[jnero]

I am running a laptop. If that's the case why does it not do it in
windows?

[jnero]

I mean dos. Sorry

[Hopismum]

I am running a laptop. If that's the case why does it not do it in
windows?

Just out of curiosity what make/model  etc is the laptop?     Some of them (Toshiba's) used to
overheat abit and shut down and a Bios update cured it.

[jnero]

Toshiba Satellite 1805 Series
Model#1805-S207

What is weird about it to me is that when I restart I do not get any error
messages either. It's as if it shuts down properly but it does it so fast that
you don't have time to save any thing.

It's like the zip drive light will flash and as soon as that happens I have
less than a second to respond.
 

[calcu007]

Is there is a prompt screen before the shutdown? What OS do you have? All updates?

[jnero]

No warning what so ever other than the zip drive light flashing as if I just
put a disk in.

Machine is constantly updating on it's own.

Running XP Home, I have not updated the bios and have had the unit
now for over 2 years.

I will try that to see if it resolves that issue.

It will run for a long time some times all day but if I do a thorough
virus scan that just kills it.

[Hopismum]

No warning what so ever other than the zip drive light flashing as if I just
put a disk in.

Machine is constantly updating on it's own.

Running XP Home, I have not updated the bios and have had the unit
now for over 2 years.

I will try that to see if it resolves that issue.

It will run for a long time some times all day but if I do a thorough
virus scan that just kills it.

It could, of course, be caused by many different things.. . but I would try the
bios update.   I used to work in a laptop support dept and we saw this problem
with Toshiba's quite often.    The bios update always cured it....  its worth a try

edit:  I do not want to sound as though I believe this is the only problem 
You mention you have several trojans and worms?   I would also use Google
and check on the specific trojans/worms you have and see what you can find
out about them..     Probably not a bad idea to allso run Spybot, Ad Aware, and
HiJack This as well

[jnero]

Yes I have a program by Lavasoft to eliminate adware but the system
keeps cutting off.

I just downloaded the bios update so I will give that a shot.

Thanks to every one here for all your support. I sincerely appreciate
it!

[Hopismum]

come back and let us know how it goes..

lots of good minds here.. someone will be able to help you work this out

[kamulko]

Have you tried the "msconfig" panel?