How to Delete Windows .Msp Files

By Arn Goldman

MSP files are package files created when Microsoft Office runs an update. These files usually appear in your Installer folder, and they occasionally aren't automatically deleted after the update is complete. Some MSP files can be deleted without creating a problem; however, others can cause data loss.

Things You'll Need

  • Pen and paper

Step 1

Open your Windows Installer folder. In Vista, click the Start button and type "installer folder" to find it. (Do not include the quotation marks.) In earlier versions of Windows, click the Start button, click My Computer, access the C: Drive and double-click the Installer folder.

Step 2

Write down all of the files in the folder that end in MSP. To simplify the process, you could type them into a Word document.

Step 3

Click the Start icon and type "regedit" into the search box. (Omit the quotation marks.) Click on "Registry Editor." In earlier versions of Windows, click the Start button and select "Run." Type "regedit" into the window and press "OK." (Again, omit the quotation marks.)

Step 4

Click "My Computer" in the Registry Editor.

Step 5

Click "Find" in the "Edit" menu.

Step 6

Type one of the MSP file names into the search bar.

Step 7

Take note of what happens after you type in the MSP file name. If you get the message, "finished searching through the registry," you can safely delete the MSP file by dragging it to the Recycle Bin. If Registry Editor is able to locate the file and places it in the "Data" column, then the file should not be deleted. Doing so may corrupt your Microsoft Office data.

Step 8

Repeat Steps 6 and 7 for each file. Empty the Recycle Bin by right-clicking on it and selecting "Empty Recycle Bin".