You can Re-register this file it by typing "regsvr32 comctl32.ocx" from the command line in the system32 directory. 
Perform the following steps to make the changes:
1. Click Start
2. In the Search bar type CMD
3. In the programs pane right click on cmd and "run as an Administrator"
4. Put in your credentials for UAC prompt
5. In the command prompt type in "regsvr32 comdlg32.ocx" then press ENTER


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Hello Welcome to SF !!

1. Download comdlg32.zip and save to Desktop.
2. Unzip the file using WinZip or any other utility.
3. Extract comdlg32.ocx to Windows\System32 folder.
4. Type the following command from Start, Type Run then Hit enter then under Run type
5. regsvr32 %Systemroot%\System32\comdlg32.ocx


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If it doesn't work try

At c:\windows\system32 look for CMD.exe ctrl + right clic and execute as Administrator the command
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