This is a Dell Inspiron with a Pentium 4 (2.4 GHz) and 256 KB of memory. I installed a new XP Pro operating system and then did the following: installed Avast, CCleaner, Malwarebytes, all Window Updates, Open Office, Google Chrome, Foxit Reader and Revo. I noticed the system looked to be running slowly. I then ran WD Lifeguard (extended test), Memtest86 and ran both with no issues. Malwarebytes ran with no issues and CCleaner did not find anything unusual. I've also done a defrag of the drive (smallish 20 GB) but this system is intended for a grandchild to use for simple programs and Skype.
Can someone suggest what else I can do to diagnose why the system is "sluggish"? Thank you.