Indexing Service may cause some problem such as system freeze. We can use the following methods to disable it:

Method 1: Use a tool to disable it
========================
www.windowsuu.com/xp-tweaks/indexingservice.reg

Method 2: Manually disable Indexing Service
========================
1. Click Start - Run, type in services.msc and press Enter.
2. Find the Indexing Service, double click and disable it.

Method 2: Run command to disable Indexing Service
========================
Use Start - Run to run the following command:

sc config cisvc start= disabled