emachines

If you were able to take the hard drive out and get the files. then the hard drive is working. You should check your ram. Could you post more details about your problem. By will not load the logon screen, what do you mean? Is it that your laptop would turn on, you could feel it vibrating (meaning that it's powered up and working)? does the screen light up but you only get a black "lighted" screen, or is your screen not lighting up at all? Does your laptop turns on, you could feel it vibrating then after sometime the power would go out? Please describe as detailed as possible so we could try to isolate the problem

I suggest reformatting your laptop after you backed-up your files and if the problem is still the same then try removing and reinserting the RAM.If this doesn't work, try using a different RAM, it is better to borrow one first that way you could be sure before spending to buy a new one.

I had a similar problem with one of my computers. It downloaded and installed an automatic update but the process didn't go right. I was able to get my computer back up and running by restoring it to the most recent system restoration point. You should be able to get into restore mode by pressing F8 when your computer boots. You have to do it before the Windows logo appears or it won't work. Here's a tutorial on how to use the restore options from Microsoft: http://windows.microsoft.com/en-US/windows7/What-are-the-system-recovery-options-in-Windows-7