I too am having the same error, from that Trojan. However, when I tried to download Grinler's reg file, it just popped up another window that held :

REGEDIT4

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System]
"NoDispAppearancePage"=-
"Wallpaper"=-
"WallpaperStyle"=-
"NoDispBackgroundPage"=-

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]
"NoActiveDesktopChanges"=-

[HKEY_CURRENT_USER\Control Panel\Desktop]
"Wallpaper"=-
"WallpaperStyle"=-

[HKEY_CURRENT_USER\Control Panel\Colors]
"Background"="0 78 152"

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run]
"notepad.exe"=-
"notepad2.exe"=-
"winlogon.exe"=-
"paint.exe"=-

[-HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\Currentversion\Explorer\Browser Helper Objects\{FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF}]

[-HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\Currentversion\Explorer\Browser Helper Objects\{FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFA}]

[HKEY_LOCAL_MACHINE\Software\Microsoft\Internet Explorer\Search]
"SearchAssistant"="http://ie.search.msn.com/{SUB_RFC1766}/srchasst/srchasst.htm"
"CustomizeSearch"="http://ie.search.msn.com/{SUB_RFC1766}/srchasst/srchcust.htm"
"Default_Search_URL"="http://www.microsoft.com/isapi/redir.dll?prd=ie&ar=iesearch"

[HKEY_LOCAL_MACHINE\Software\Microsoft\Internet Explorer\Main]
"Default_Search_URL"="http://www.microsoft.com/isapi/redir.dll?prd=ie&ar=iesearch"
"Search Page"="http://www.microsoft.com/isapi/redir.dll?prd=ie&ar=iesearch"

[HKEY_USERS\.DEFAULT\Software\Microsoft\Internet Explorer\Main]
"Search Page"="http://www.microsoft.com/isapi/redir.dll?prd=ie&ar=iesearch"
"Search Bar"="Search Bar"="http://search.msn.com/intl/searchpane/en-au/prov2.htm"

[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchUrl]
""="http://home.microsoft.com/access/autosearch.asp?p=%s"

[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\main]
"Search Page"="http://www.microsoft.com/isapi/redir.dll?prd=ie&ar=iesearch"
"Search Bar"="http://search.msn.com/spbasic.htm"
"Use Custom Search URL"= dword:00000000
"Use Search Asst"=-

[-HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Ext\Stats\{FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF}]

[-HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Ext\Stats\{FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFA}]

[-HKEY_CLASSES_ROOT\CLSID\{FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF}]

[-HKEY_CLASSES_ROOT\CLSID\{FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFA}]

[-HKEY_CLASSES_ROOT\CLSID\VMHomepage]

[-HKEY_CLASSES_ROOT\CLSID\VMHomepage.1]

[-HKEY_CLASSES_ROOT\Interface\{1E1B2878-88FF-11D2-8D96-D7ACAC95951F}]

[-HKEY_CLASSES_ROOT\TypeLib\{1E1B286C-88FF-11D2-8D96-D7ACAC95951F}]

[-HKEY_CLASSES_ROOT\VMHomepage]

[-HKEY_CLASSES_ROOT\VMHomepage.1]

[-HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objecta]

[-HKEY_LOCAL_MACHINE\SYSTEM\ControlSet003\Services\HTTP\Parameters\S]

[-HKEY_LOCAL_MACHINE\SYSTEM\ControlSet003\Services\HTTP\Parameters\S]

[-HKEY_LOCAL_MACHINE\SYSTEM\ControlSet003\Services\SharedAccess\Parameters\r]