Follow the steps:
1) Click Start, Run and type Command
(not same cmd
, cmd won't run because it is an exe; Command
is a com
Type the following and then press Enter after typing each one: cd\windows copy regedit.exe regedit.com
(again as .exe wont work we are make a .com copy)regedit.com
2) Navigate to and select the following key: HKEY_CLASSES_ROOT \ exefile \ shell \ open \ command
Double-click the (Default)
value in the right pane
Delete the current value data, and then type: "%1" %*
3) Navigate to: HKEY_CLASSES_ROOT\.exe
In the right-pane, set (default)
4) Now .exe should be working. But, U might still have a trojan which caused the problem in the first place. Run a Virus Scan.
If U need help removing the trojan go to the Malware Removal Forums
and start a new topic there.