IDX means "index". Whether to keep them or not, I couldn't tell you. Hopefully, someone else will have some advice.

Richard

Dimension 4100
Pentium III, 933 MHz
20GB Ultra ATA-100 Hard Drive (7200 RPM)
256MB 133MHz SDRAM
Windows ME
17" M781s Monitor
32MB NVIDIA TNT2 M64 AGP Graphics Card
48X Max Variable CD-ROM Drive
QPS Que! 16x10x40 CD-RW Drive
Soundblaster 64V PCI with Dell Jukebox
harman/kardon Speakers
V.90/56K Telephony Modem for WindowsME-Sound Option
Toshiba DOCSIS Cable Modem PCX1100U
Linksys EtherFast 10/100 LAN Card
QuietKey Keyboard
MS Intellimouse
Xerox Docuprint M750 Inkjet Printer
Canon BJ-200 Bubble Jet Printer
IBM NetCamera