Why is not booting into safe mode stopping you from downloading? There are many ways to get to safe mode but if it is the malware that is blocking it then
DO NOT FORCE SAFE MODE Instead continue on with any malware removal the best you can and post any logs you can get.
Many Dell computers (mine included) the keyboard is the last thing to load so safe mode is impossible with the F8 method.
If this is the case then use the tools below. If safe mode is "broken" then use SafeBootKeyRepair.
Download & run this tool
SafeBootKeyRepair-CF.
It will only take a short moment for it to finish running. A log will be produced at
C:\SafeBoot_Repair.txt. Please post that in your next reply.
Do you have SUPERAntiSpyware installed? If so go to C:\Program Files\SUPERAntiSpyware and right click BootSafe.exe and send it to the desktop as a shortcut. Use it to boot into safe mode.
If not then download the stand alone version
here
