An idea to keep in the back of your mind--it may be easiest for you to just try a Repair Install and see if that improves the system. Here's a good step by step guide for performing a Repair Install of Windows XP to give you an idea of what is involved.
Windows XP Home Repair for all service pack versions of XP*
We can also have a look at Windows Event Viewer. It might give us a clue as to what is causing these issues.
Go to Start > Run - type in
eventvwr <Press Enter>
This is a picture of what the event viewer looks like.
You will see
Application, Security &
System listed in the left pane.
- In the left pane click on Application.
- Click the gray title “Type” at the top of the source name column in the right pane to sort by type name
Look for “Error” & double-click on the most recent 5, and evaluate the event description for any indication of the cause of the problem.
- Make note of the Description, EventID and Source of these Event Properties.
- From the right pane, doubleclick on the line where it says error & you should get a window like the example below

- In the upper right corner of this picture, you should see 2 arrows. One is pointing up & the other, pointing down.
There is another button below the 2 arrows. Click once on it. (this will copy some information to clipboard)
- Open notepad & paste the info in there. This will copy the event information to the clipboard. Paste the information for each event here
Repeat steps 1-6 for
System
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