Are these alerts with firefox, IE or both ?

Warning This fix is only relevant for this system and no other, using on another computer may cause problems

Run OTL

[*]Under the Custom Scans/Fixes box at the bottom, paste in the following

:OTL FF - prefs.js..extensions.enabledItems: {d57c9ff1-6389-48fc-b770-f78bd89b6e8a}:1.36 FF - HKEY_LOCAL_MACHINE\software\mozilla\Firefox\extensions\\{6E158481-1672-4A36-9716-FA892ABC954E}: C:\Documents and Settings\david\Local Settings\Application Data\{6E158481-1672-4A36-9716-FA892ABC954E} [2011/06/07 03:10:14 | 000,000,000 | ---D | M] [2011/09/13 21:18:49 | 000,000,000 | ---D | M] (SearchStatus) -- C:\Documents and Settings\david\Application Data\Mozilla\Firefox\Profiles\yiu5jc8a.default\extensions\{d57c9ff1-6389-48fc-b770-f78bd89b6e8a}

:Files
ipconfig /flushdns /c

:Commands
[purity]
[resethosts]
[emptytemp]
[EMPTYFLASH]
[CREATERESTOREPOINT]
[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.