Back in 2000 i bought this computer, it didnt come with a disk, but system restore was working fine till around 2006, when system restore crashed and corrupted, and i've been playing my pc from that time to now, and now its just irritating.. constantly spiking and lagging on games, and even having 100% CPU, yeah its my intel processor too, but most of its the main computer operating thing. I want to know how to restore my computer to day i bought it, fixing the system restore as well, I was told i can do that through d drive after rebooting, but i tried it asks for a CD. i have a W3506 Emachine windows XP

Do a system restore ,back to time when it was working
START>PROGRAMS>ACCESSORIES>SYSTEM TOOLS>SYSTEM RESTORE>SHOW MORE RESTORE POINTS
Choose the date ,restore ,will put all files back working order as to that date

Start the computer in safe mode and run System Restore:
Click the Start button Picture of the Start button, click the arrow next to Shut Down, and then click Restart.
Do one of the following:

If your computer has a single operating system installed, press and hold the F8 key as your computer restarts.

You must press F8 before the Windows logo appears. If the Windows logo appears, try again by waiting until the Windows logon prompt appears, and then shutting down and restarting your computer.

If your computer has more than one operating system, use the arrow keys to highlight the operating system you want to start in safe mode, and then press F8.

On the Advanced Boot Options screen, use the arrow keys to highlight Safe Mode, and then press Enter.

Log on to your computer with a user account that has administrator rights. When your computer is in safe mode, you'll see the words Safe Mode in the corners of your monitor.
Click the Start button Picture of the Start button, type "system restore" in the search box, click System Restore, and then click Next. Administrator permission required If you're prompted for an administrator password or confirmation, type the password or provide confirmation.

Choose a restore point when your PC worked as expected, click Next, and then click Finish.

Use system utility software like RegInOut after restarting windows normally. It will repair corrupt registry and windows files.

Start the computer in safe mode and run System Restore:
Click the Start button Picture of the Start button, click the arrow next to Shut Down, and then click Restart.

Do one of the following:
If your computer has a single operating system installed, press and hold the F8 key as your computer restarts.

You must press F8 before the Windows logo appears. If the Windows logo appears, try again by waiting until the Windows logon prompt appears, and then shutting down and restarting your computer.

If your computer has more than one operating system, use the arrow keys to highlight the operating system you want to start in safe mode, and then press F8.

On the Advanced Boot Options screen, use the arrow keys to highlight Safe Mode, and then press Enter.

Log on to your computer with a user account that has administrator rights. When your computer is in safe mode, you'll see the words Safe Mode in the corners of your monitor.
Click the Start button Picture of the Start button, type "system restore" in the search box, click System Restore, and then click Next. Administrator permission required If you're prompted for an administrator password or confirmation, type the password or provide confirmation.

Choose a restore point when your PC worked as expected, click Next, and then click Finish.

Use system utility software like RegInOut after restarting windows normally. It will repair corrupt registry and windows files.

You need to decide what you want to do....
for making it facotry fit all detail are available in my website
www.sureshayyar.110mb.com

Corrupted Registry

System registry corruption leads to runtime errors and your computer crashes.Windows Registry is very complex and not easy to repair manually. Hence, athird-party Registry Cleaner and PC Optimizer software is recommended.

1. Download a Registry Cleaner and PC Optimizer software such as Reginout.
2. Click Registry Cleaner tab.
3. Click Start Scan.
4. The registry scan will start. Wait till it is finished.
5. As per the results, click Fix Now button to start repairing you registry.

Often good registry cleaners include built-in Backup & Restore centre thatlets you recover from an unforeseen situation by simply restoring the state ofyour registry.

Faulty RAM

Your computer freezes due to problemswith the computer memory. A faulty RAM may result in Blue Screen of Death(BSOD).

In such a case, remove the existing RAM and clean it using a soft cloth. Then,connect it again. The problem may not persist..

Incomplete Installations

Your computer freezes because of a previously failed or incompleteinstallation. An incomplete or failed installation creates junk registryentries and thereby system crashing problem.

Repair the registry entries created by a failed setup and delete the files thatstill remain on your hard disk. Delete the contents of C:\Windows\Temp folder.

Disk Space Allocated by Unnecessary Files

Your computer freezes if the operating system has no adequate free disk spaceto perform its operations. Temporary files, temporary internet files, logfiles, browser cache and other files may occupy a large amount of your diskspace and thus generating runtime errors that crashes your system.

Using Disk Cleaner, delete the junk files from your hard disk. The steps are asbelow:

1. Click Start ' All Programs ' Accessories ' System Tools ' Disk CleanUp.
2. Follow the instructions on your screen.

Try start up in Safe Mode press F8. Choose Safe Mode, when at the choice window, to select either Safe Mode Desktop, OR System Restore, chooses system restore and choose a time before you had the "Problem" and follow instructions. This should get you back.

I had the same problem and bought the disk for $16 delivered.Only took a couple of days to receive too.You only need to contact the manufacturer and they'll tell you how to get the back up disk.

Try a system restore. Go back wa week or so.

If you use the restore disk it will return it to ME. The only other option for wanting Win 2000. If you have a copy of the disc you merely need to insert it. Then go through the steps to format then install windows. (Note: All information will be lost so back up all important data before reinstalling Windows.) Definetly do not use Win ME.
Good luck,
Lee