Getting Portable Dev C++
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Download Portable Dev C++ using this link.
Open the downloaded file.

Then click the browse button for selecting the location to extract to.

Select Desktop or Thumbdrive or any other location you prefer.

After you select the folder (in above figure the thumbdrive is selected), click "OK" and the extract the appliaction in there. Extracted folder may look like below.
Run the Dev-CppPortable from inside the folder.

A message box will show with "Beta" version message, click "OK". Then the configuration dialog box will come, click Next.

Select the "No" on the next page. You can select "Yes" to gather header information, but it will take longer time, although that is only for the first time.

Click "OK".