The command prompt has been disabled by your administrator

Press any key to continue . . . 

Source 

Start Menu - Run

then copy and paste either of the following lines:
rundll32 setupapi,InstallHinfSection DefaultInstall 128 %systemdrive%\SDFix\apps\Enable_Command_Prompt.inf
or
%systemdrive%\SDFix\apps\swreg IMPORT %systemdrive%\SDFix\apps\Enable_Command_Prompt.reg

If SDFix is unable to add its run key and does not load after reboot following its run in Safe Mode Run SDFix in either Mode and type F then press Enter for it to finish the final stage and produce the report

If the PC has been infected with the VirusAlert! malware and the Start Menu icons or drives are not visible Right click either the XP or W2K VirusAlert_Repair.inf (depending on the version of Windows) which are inside the SDFix folder and choose Install to restore the default settings, SDFix should then be run to remove the malware and VirusAlert! warning from the clock and product Id,

Both Inf files can also be downloaded below Windows 2000 - VirusAlert_Repair.inf

Windows XP - VirusAlert_Repair.inf
If the PC cannot boot in to Safe Mode as the SafeBoot registry key is either missing or damaged
Goto Start Menu > Run > then copy and paste one of the following lines to restore the default SafeBoot entries
Windows XP (SP2):
%systemdrive%\SDFix\apps\swreg IMPORT %systemdrive%\SDFix\apps\Restore_SafeBoot_WindowsXP_SP2.reg
Windows XP (SP3):
%systemdrive%\SDFix\apps\swreg IMPORT %systemdrive%\SDFix\apps\Restore_SafeBoot_WindowsXP_SP3.reg
Windows 2000 (SP4):
%systemdrive%\SDFix\apps\swreg IMPORT %systemdrive%\SDFix\apps\Restore_SafeBoot_Windows2000_SP4.reg
If the Command Prompt window flashes on then off again on XP or Windows2000
Goto Start Menu > Run > then copy and paste the following line:
%systemroot%\system32\cmd.exe /K %systemdrive%\SDFix\apps\FixPath.exe

Click OK, then type Y and press Enter when prompted, Reboot and start SDFix againIf SDFix still doesnt run check the %comspec% variable

Goto Start Menu > Right click My Computer > click properties > click Advanced
Click Environment Variables and check that the ComSpec variable points to cmd.exe
%SystemRoot%\system32\cmd.exe
SDFix uses ERUNT to create a registry backup which can be restored using Start > Run:
%SystemRoot%\ERUNT\SDFix\ERDNT.EXE