Boot the system, start tapping F8, when the menu appears, select "Last Known
Good Configuration" and press enter.
If that fails to resolve, boot the system again, following the above steps
again, this time, select Safe Mode and press enter. Once in Safe Mode, you
should immediately be presented with the option to go to System Restore,
accept the option and try using System Restore to take you back to a time
prior to when this began.
If no luck, again boot to safe mode, make sure you antivirus software is up
to date and run a scan on your system. Also, make sure there's not malware
that might be the source of the issue, download, install and run Ad Aware:
www.lavasoftusa.com
Still no luck, try a repair install as follows:
NOTE, while a repair install should leave your data files intact, if
something goes wrong during the repair install, you may be forced to start
over and do a clean install of XP. If you don't have your data backed up,
you would lose your data should that eventuality occur.
Assuming your system is set to boot from the CD-ROM drive and you have an
actual XP CD as opposed to a recovery CD, boot with the XP
CD in the drive and perform a repair install as outlined below. If the
system isn't set to boot from the CD or you are not sure, you need to enter
the system's BIOS. When you boot the system, the first screen usually has
instructions that if you wish to enter set press a specific key, when you
see that, do so. Then you will have to navigate to the boot sequence, if
the CD-ROM drive is not first line, set it first in the boot sequence. Save
your settings and exit with the XP CD in the drive. The system will reboot.
When the system boots, a few screens into the process you may see a message
instructing you
to hit any key in order to boot from the CD along with a countdown. When
you see this be sure to
hit a key on the keyboard, if you miss this instruction and the system fails
to boot from the CD, it's too
late, you'll need to reboot and try again.
Once you have pressed a key, setup should begin. You will see a reference
asking if you need to load special drivers and another notice that if you
wish to begin the ASR (Automatic Recovery Console) depress F2. Just let
setup run past all of that. It will continue to load files and drivers.
Then it will bring you to a screen. Eventually, you will come to a screen
with the option to (1) setup Windows or (2) Repair Windows Installation
using the Recovery console. ***The selection you want at this screen is
"Setup Windows,"
NOT "Repair Windows Installation.
The first option, to setup Windows is the one you want and requires you to
press enter. When asked, press F8 to accept the end user agreement. Setup
will then search for previous versions of Windows. Upon finding your
version, it will ask if you wish to Repair your current installation or
install fresh. Press R, that will run a repair installation. From there
on, follow the screens.