Simply perform a system restore to a date prior to this happening. Make sure to disable your antivirus program before doing so.......

Dell Dimension 8100
Pentium 4, Processor 1.5GHz
256MB PC800 RDRAM
15" E551 Monitor
32MB NVIDIA GeForce2 MX 4X AGP Card TV-OUT
40GB Ultra ATA Hard Drive (7200RPM)
Windows Millennium (ME)
Mouse W/Wheel,1.3A
Soundblaster 64V PCI Sound
V.905/56K PCI DataFax Modem for Windows
8X/4X/32X CD-RW Drive
harmon/Kardon 695 speakers
integrated 3Com Etherlink, 10/100 Ethernet control
Bios A06