Thanks for your help. The error message did not appear on re-booting. The OTL log:
All processes killed
========== FILES ==========
File\Folder C:\Users\MARK&B~1\AppData\Local\Temp\MarkAny not found.
C:\Program Files (x86)\MarkAny\ContentSafer\UpdateClient folder moved successfully.
C:\Program Files (x86)\MarkAny\ContentSafer\Data folder moved successfully.
C:\Program Files (x86)\MarkAny\ContentSafer folder moved successfully.
C:\Program Files (x86)\MarkAny folder moved successfully.
========== REGISTRY ==========
Registry value HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\\MAAgent deleted successfully.
========== COMMANDS ==========
[EMPTYTEMP]
User: All Users
User: Default
->Temp folder emptied: 0 bytes
->Temporary Internet Files folder emptied: 67 bytes
->Flash cache emptied: 56504 bytes
User: Default User
->Temp folder emptied: 0 bytes
->Temporary Internet Files folder emptied: 0 bytes
->Flash cache emptied: 0 bytes
User: Maradona
->Temp folder emptied: 2451317 bytes
->Temporary Internet Files folder emptied: 468269641 bytes
->Java cache emptied: 726032 bytes
->FireFox cache emptied: 1098857934 bytes
->Google Chrome cache emptied: 8797913 bytes
->Flash cache emptied: 15275160 bytes
User: Public
->Temp folder emptied: 0 bytes
%systemdrive% .tmp files removed: 0 bytes
%systemroot% .tmp files removed: 0 bytes
%systemroot%\System32 .tmp files removed: 0 bytes
%systemroot%\System32 (64bit) .tmp files removed: 0 bytes
%systemroot%\System32\drivers .tmp files removed: 0 bytes
Windows Temp folder emptied: 20142 bytes
%systemroot%\sysnative\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files folder emptied: 50400 bytes
RecycleBin emptied: 7072651 bytes
Total Files Cleaned = 1,527.00 mb
OTL by OldTimer - Version 3.2.70.2 log created on 10172012_184716
Files\Folders moved on Reboot...
C:\Users\Maradona\AppData\Local\Temp\FXSAPIDebugLogFile.txt moved successfully.
File move failed. C:\Windows\temp\_avast_\Webshlock.txt scheduled to be moved on reboot.
PendingFileRenameOperations files...
Registry entries deleted on Reboot...
All processes killed
========== FILES ==========
File\Folder C:\Users\MARK&B~1\AppData\Local\Temp\MarkAny not found.
C:\Program Files (x86)\MarkAny\ContentSafer\UpdateClient folder moved successfully.
C:\Program Files (x86)\MarkAny\ContentSafer\Data folder moved successfully.
C:\Program Files (x86)\MarkAny\ContentSafer folder moved successfully.
C:\Program Files (x86)\MarkAny folder moved successfully.
========== REGISTRY ==========
Registry value HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\\MAAgent deleted successfully.
========== COMMANDS ==========
[EMPTYTEMP]
User: All Users
User: Default
->Temp folder emptied: 0 bytes
->Temporary Internet Files folder emptied: 67 bytes
->Flash cache emptied: 56504 bytes
User: Default User
->Temp folder emptied: 0 bytes
->Temporary Internet Files folder emptied: 0 bytes
->Flash cache emptied: 0 bytes
User: Maradona
->Temp folder emptied: 2451317 bytes
->Temporary Internet Files folder emptied: 468269641 bytes
->Java cache emptied: 726032 bytes
->FireFox cache emptied: 1098857934 bytes
->Google Chrome cache emptied: 8797913 bytes
->Flash cache emptied: 15275160 bytes
User: Public
->Temp folder emptied: 0 bytes
%systemdrive% .tmp files removed: 0 bytes
%systemroot% .tmp files removed: 0 bytes
%systemroot%\System32 .tmp files removed: 0 bytes
%systemroot%\System32 (64bit) .tmp files removed: 0 bytes
%systemroot%\System32\drivers .tmp files removed: 0 bytes
Windows Temp folder emptied: 20142 bytes
%systemroot%\sysnative\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files folder emptied: 50400 bytes
RecycleBin emptied: 7072651 bytes
Total Files Cleaned = 1,527.00 mb
OTL by OldTimer - Version 3.2.70.2 log created on 10172012_184716
Files\Folders moved on Reboot...
C:\Users\Maradona\AppData\Local\Temp\FXSAPIDebugLogFile.txt moved successfully.
File move failed. C:\Windows\temp\_avast_\Webshlock.txt scheduled to be moved on reboot.
PendingFileRenameOperations files...
Registry entries deleted on Reboot...