hard to get on internet,keep losing connection

this started today, i could not access yahoo this morn and every couple minutes my internet connectivity is lost. i don't know whats going on. i followed the directions in the read this first file...what do i do now?
one of the logs said i had a trojan.

 

<?xml version="1.0"?>
-<Log filesProcessed="56875" timeSpentInSecs="167" date="2012-07-08T10:30:53" version="3.6.0.160" scan="Normal" computer="HP">-<Item type="Malware" status="None" score="101.0" malwareName="Malware">-<Scanners><Scanner name="Infected" id="DrWeb"/></Scanners><File hash="55880BBE252077353548EF0FEA7F2DB3150431B865DE31795E111A68ECE8E1C7" path="C:\Users\greg & jacki\AppData\LocalLow\GamingWonderlandEI\Installr\Cache\0255D41C.exe"/></Item>-<Item type="Malware" status="None" score="116.0" malwareName="Trojan">-<Scanners><Scanner name="Trojan.MulDrop3.58135" id="DrWeb"/></Scanners><File hash="BF0F6DDB1927531A37FD2B971B580F5979516A76A9B4ED39E5AB2349CB5425F4" path="C:\Users\greg & jacki\Desktop\MGtools.exe"/></Item>-<Item type="Repair" status="None" score="0.0"><File path="C:\Windows\system32\drivers\etc\hosts"/></Item></Log>

 

Welcome to MajorGeeks, greghoffman

Please attach all 4 logs for review. (How to attach)