*Note: You are probably going to need help with this in case you turn off JAWS and need someone that can see the list to turn it back on. I'm not sure if once it's disabled on startup, if the shortcut key for it will work.General Startup Menu Access Instructions for XP (2 Methods)
Click on "Start" then "Run" and in the run line type in “MSCONFIG” hit Enter or click on OK.
Next click on the "Start Up" tab.
By default all items are usually checked, but you can remove any items that you don’t feel need to be running when you start your computer.
*NOTE: This is the hard part. Most can be unchecked to turn them off since most programs don't need to be loaded when the computer loads BUT you'll need to figure out which ones are for the software that you need such as JAWS, Antivirus, and Firewall etc...
After you have made your selections, click "Apply", "OK" and "Restart."Second Method
Use Windows Defender to disable programs in Windows XP Home Edition, follow these steps:
Click Start, click All Programs, and then click Windows Defender.
Click Tools, and then click Software Explorer.
Click the application name in the Name column that you want to disable, and then click Disable.