Tech Tips Home
The Best Tech Tips And Daily Deals
Newsletter On The Internet!

WorldStart Tech Tip And Store Search
Email: Password: Login Remember Me

Like what you see here? Subscribe to the Tech Tips newsletter!   Email: Subscribe

Installer Directory In C:\Windows: Delete Or Keep?

Wednesday, February 27th, 2013 by | Filed Under: System Tune-Up Help, Windows Explorer

Peter from Kerrville, Texas writes:

My system runs Windows XP, Service Pack 3. In the “Windows” directory there is a sub-directory labelled “Installer”. This directory is very large (2 GB) and contains many .msp and .msi files. My question is can any of these files be deleted in order to regain some disk space? Thank you in advance for your help and answer.


The installer directory contains software patches and installers which may be critical to removing or updating certain pieces of software on your system. It is not a good idea to remove the files unless you know for sure they pertain to a program you no longer have installed. The good news is, if you’re not running Office 2007, you can use an older utility from Microsoft called the Windows Installer Cleanup Tool. It will clean out the installer directory of packages that are no longer needed or valid.

Since the tool is no longer supported by Microsoft due to compatibility issues with Office 2007, you’ll have to download it from a third party. You can download the tool from Softpedia by clicking here then clicking Softpedia Mirror (US) [exe].

Double-click the installer and follow the installation prompts. Once you have installed the tool, open a command prompt (Click Start, Click Run, type cmd.exe  and press enter.) and type msizap.exe G! to clean out your installer directory.


P.S. Though I’m usually big into saving as much hard drive space as possible, saving space in the Windows folder is one exception I make. While this tool does what it says, I always allow my Windows folder safe haven from my hard drive space worries. It’s quite difficult to figure out what packages might be associated with or used in future for some application. A few extra gigabytes on a modern hard drive won’t hurt.

Tags: , , , ,

One Response to “Installer Directory In C:\Windows: Delete Or Keep?”

  1. Tom McGonegal says:

    Wow! I was not aware of how this folder grows in size. Mine is 4.65 GB. I too have xp SP3.

    I do have Office 2007. Can you explain what the problem is with Office 2007?

    Thank you,


Leave a Reply

Like these tips? Get them for FREE in your email!

WorldStart's Tech Tips Newsletter

  • Tech Tips Daily - Become a tech pro! Get the very best tech and computer help sent directly to your email every weekday!

  • Tech Tips Weekly - If you don't want our Tech Tips newsletter every day, then sign up for this weekly newsletter to get the best information of the week. Sent on Fridays.

Other Newsletters

  • WorldStart's Daily Deals - Every week, we send out great deals in our Daily Deals newsletter. Many of these deals are exclusively for our Daily Deals newsletter subscribers and can't be found with our regular specials.

  • Just For Grins - Each issue includes a couple clean jokes, some funny quotes, and a hilarious reader's story. Newsletter is sent five days a week.

Enter Email Address:


Your e-mail address is safe with us!
We only use it to send you the newsletters you request. It is NEVER disclosed to a third party for any reason, ever! Plus, if you decided you don't like our newsletters (don't worry, you'll love them), unsubscribing is fast and easy.

Free Newsletter Signup

Tech Tips Daily

Become a tech pro! Get the very best tech and computer help sent directly to your email every weekday!

Tech Tips Weekly

The week's best in tech and computer help. Get your issue sent to your email every Friday!

WorldStart's Daily Deals

The very best deals on the Internet! Get a new set of incredible sales every day of the week!

Just For Grins

Clean jokes, funny quotes, and hilarious comics. Sent 5 times a week straight to your email.


Love Worldstart? Refer A Friend!

WorldStart's Premium Membership

Tip Archive