The desktop icon could be hidden or you may have accidentally deleted it.
If the run command does not work, redownload ComboFix from here
and follow these instructions
- When it has finished you will see a dialog box stating that "ComboFix has been uninstalled".
- After that, you can delete the ComboFix.exe program from your computer (Desktop).
- If you encounter any problems using the switch from the Run dialog box, just rename ComboFix.exe to Uninstall.exe, then double-click on it to remove.
Afterwards, please do NOT run ComboFix again unless asked to do so by a member of the Malware Removal Team. Why?
Please read the pinned topic ComboFix usage, Questions, Help? - Look here