You do not describe symptoms consistent with a need to run the System File Checker, but you can sure try it if you want.
If the Microsoft engaged Forum Moderator "expert" suggestion to run SFC fixes your issue, I will send you or your favorite charity $100 American.
Also note that if you do not have a genuine bootable XP installation CD with Service Pack 3 on it, (most people don't), SFC is going to complain - alot so get ready for a lot of complaining.
Please provide additional information about your system as best you can:
If the problem just started recently, keep in mind that MS updates come out the second Tuesday of every month (
Patch Tuesday) so would you say the problem start before or after last Tuesday (9/11/2012)?
If after, do you recall accepting any MS hardware driver updates - video, audio, network drivers... Accepting these driver updates from MS is generally not a good idea.
Do you have the problematic Windows Desktop Search installed?
Describe your current antivirus and anti malware situation: McAfee, Symantec, Norton, Spybot, AVG, Avira!, MSE, Panda, Trend Micro, CA, Defender, ZoneAlarm, PC Tools, Comodo, etc.
Was the issue preceded by a power interruption, aborted restart, or improper shutdown? (this includes plug pulling, power buttons, removing the battery, etc.)
Does the afflicted system have a working CD/DVD drive (internal or external)?
Do you have a genuine bootable XP installation CD that is the same Service Pack as your installed Service Pack (this is not the same as any Recovery CDs that came with your system)?
If the system used to work properly, what do you think might have changed since the last time it did work properly?
Now provide a few more gory details:
Click Start, Run and in the box enter:
msinfo32
Click OK, and when the System Summary info appears, click Edit, Select All (Ctrl-A), Copy (Ctrl-C) and then paste (Ctrl-V) the information back here in your next reply.
For video device and driver information, expand the Components, click Display, click Edit, Select All, Copy and then paste the information back here.
There will be some personal information (like System Name and User Name), and whatever appears to be private information to you, just delete it from the pasted information.
This will minimize back and forth Q&A and eliminate guesswork.