OK your log was large because you have either just re-installed or updated to SP3
Run OTL
[*]Under the Custom Scans/Fixes box at the bottom, paste in the following
:OTL
O3 - HKCU\..\Toolbar\WebBrowser: (no name) - {D4027C7F-154A-4066-A1AD-4243D8127440} - No CLSID value found.
[2010-05-15 20:47:50 | 000,274,432 | RHS- | C] (Ogbh4L2MOks73vCqx) -- C:\Documents and Settings\elmou\Application Data\msng.exe
:Commands
[resethosts]
[purity]
[emptytemp]
[EMPTYFLASH]
[Reboot]
[*]Then click the Run Fix button at the top
[*]Let the program run unhindered, reboot the PC when it is done
[*]Open OTL again and click the Quick Scan button. Post the log it produces in your next reply.