A good registry scanner can clean up a lot of problems with your computer. Here's a link to a good free one: www.your-free-info.com/RegCure
I've used this one and it sped up my computer by quite a bit. Hopefully this helps.
More then likely you can go into your bios setting and change start up options. You will have to check your owners manual to determine what key you will need to press to get into your bios. If the laptop is still under warranty I would contact them and they can walk you though the process.
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It's your hard drive spinning up. It's starting to show signs of wearing out. You might consider replacing it before it goes down permanently. Depending on brand they're pretty simple/inexpensive to replace and or upgrade.
They usually go into disk check mode when they have not been closed down correctly, or there is a disk error. When the laptop has settled down and loaded, click start and type DSKCHK/F in the search box then run disk check with the /F for fix. That should fix all of your errors. Hope that helps.
Step 1: Shut down your PC completely. Step 2: Turn on the Power button. Step 3: As soon as you turn it on start hitting the F8 key on your keyboard until you get to a black screen called "Windows Advanced option". (If you don't get to that that screen but you end up reaching the blue screen than that means you have delayed in hitting the F8 key. start again from step 1.) Step 4: As soon as you reach "Windows Advanced option" use your down arrow keys to choose an option called "Safe Mode". Step 5: Select that and HIT ENTER. Step 6: If you able to login then try accessing System Restore. Step 7: Click on Start and then click on All Programs. Step 8: Choose Accessories and then System Tools and System Restore. Step 9: Run the wizard by choosing "Restore My computer to an Earlier stage" Step 10: Choose a date displayed in Bold in the calender. Step 11: Your computer would reboot and wait until the restoration completes.
There are only few things which we can do if the Laptop doesnt start of shuts down at initial stage. We need to clearly understand the various stages which the system goes through while booting. And based on the stage at which the system shuts down we can analyse if there is an issue with HW or OS. If the system turns off as soon as you switches it on, This could be due to failure in post.. You may have to flash the bios and give a check to the hardware.
If it just starts the cmos and then turns off, think about any hardware which you might have attached to the laptop, remove them and then try, still if it turns off then it could be due to a major hardware detection error, which could also be due to a chipset malfunctioning on the motherboard.
If it runs till loding the OS and then turns off, we have to check the OS Boot files which could be corrupt or lost. I would advice you to take your laptop for a Hardware Check.
No running the laptop without a battery will not hurt it in any way. I would suggest like you thought that it's a cooling problem. It may need the cooling fins cleaned out and silicone grease reapply'd to the processor and heatsinks.
If you in fact formatted your HDD you need to take the drive to a drive recovery center or get the tools to hook the drive up to a working laptop/desktop and use recovery software like Ontrack Recovery Manager.
try updating the drivers to you monitor/screen, and then try updating the drivers to your video card, and then try updating the drivers to your display adaptors, all this can be done by going to start>control panel> system> hardware>device manager>*appropriate category*
oh no!! there's a possibility that it has a virus contiained on your hard drive. If you have rescue disk( comes with a floppy drive), insert it before booting up your computer. Run setup of your rescue disk then follow instructions of the certain program on how to virus scan your PC on DOS setup.