are you sure it is a service that is causing the problem?
you might want to try running Spybot to try and fix the problem
IBM/Lenovo T43 2687DSU
Pentium M 2.0Ghz
1024 MB (DDR2 SDRAM)
80 GB Ultra ATA, 5400 RPM
Windows XP Pro
64MB ATI MOBILITY RADEON X300
Integrated 802.11A/B/G, Bluetooth, 10/100/1000 Eth.