I downloaded a CPU temp monitoring program

I wish it would be that simple. The problem is that the computer dos not reboot it stays blank.
I was thinking I should connect the hard drive to another computer and (somehow) delete the program. Is that a good idea?

As RPPreacher says, booting into safe mode is the first step.

If you don't know what the name of the application was, you're still going to be a bit stuck, though.

There are a couple ways you can figure this out, from inference to digging in a bit deeper.  The first thing I would try (if it works it'll be the easiest) is to click on your start menu, and look for the the cream-hightlighted new program indicator in the "All Programs" menu.  At the very least if you can see this you'll be able to see what the program is called in order to remove it through the Add or Remove Programs interface, but ideally the application should have its own icon to remove it from the menu itself.

If that doesn't work, try going into Add or Remove Programs (through the Control Panel) and sort by "Date Last Used."  If you're lucky, it'll be near the bottom of the list (I didn't see a way to reverse the sort order).

Other than that, check to see if there was a restore point created (Accessories -> System Tools -> System Restore) when the application was installed that you can rollback to.  My experiences with successful system restores are... varied, so I would perform this as a last resort.

Are you saying that your computer does not boot to a BIOS screen?  Then you're done.  Get thee to a computer repair shop.

If you get to a BIOS screen, then start pressing F8 and uninstall the application.

If you can't get to a BIOS screen, booting to another HDD isn't going to do a thing.  If you can get to a BIOS screen, then you should be able to get to safe mode.

If you can't get to safe mode, you're hosed.

Might Safe mode with Command prompt only work?

If so....

How to Start the System Restore Tool from a Command Prompt
http://support.microsoft.com/kb/279736

i can't help but think there is another factor at work here.

if upon turning on your computer, the video stays blank, check and eliminate problems with the following:
- loose video cable (jiggle plug on both ends)
- monitor (change the monitor, preferably with new cable)
- keyboard/mouse (sometimes stuck keys can cause weirdness, just unplug and boot)
- pull extra USB and PCI cards/peripherals
- pull the hard drive (pull the IDE/SATA/SCSI cable, the BIOS screen should come up).
- remove all floppy, USB, cdrom media.

basically, start rebuilding the computer from the ground up.

I already tried removing all external components as well as the hard drive. but I still can’t get into BOIS

Sounds like your motherboard or BIOS is fried.

I reiterate my original solution "Get thee to a computer repair shop."

Buy a new mobo.

Hello
I dont know but this is probably the problem of HDD Access. Try changing your harddisk and see if things go better or undercontrol. IF this is the case we may need to have some treatment with the HDD