I keep encountering an annoying error message as I try to set up my new 64-bit Vista laptop. Often when I try to install a program, I’m told that another installation is already in progress and I must complete that one first. But no other installation is in progress, and simply rebooting doesn’t help.
I googled this problem, and found some complicated advice about failed installations and the Windows Installer Cleanup Utility. But I find that this error occurs when a program installs just fine in every respect except that it leaves the Windows Installer Service running.
There’s a easy way to fix this.
Right-click on the Computer icon, wherever it exists on your system, and select Manage. (I’m using the Classic Start menu, so the Computer icon is on my desktop. If you’re using the new Start menu, the icon is in the Start menu.) This opens the Computer Management utility.

Select Services, right click on Windows Installer in the list and select Properties. If you’re having the problem, the Windows Installer service is started, and the Stop button is disabled. Simply rebooting doesn’t stop the service. Here’s how you stop it.
In the Properties dialog, change Startup type to “Disabled”, click OK, and reboot your computer. This stops the service. After your computer reboots, again open Computer Management (right-click on Computer and select Manage), open Windows Installer Properties, and change the Startup type back to Manual. Now you’re good to go and can start a new installation.
Thanks Sheryl, much obliged for the tip.
Thank you for this guide, worked perfectly
Thank you for the information, it worked! I couldn’t get help from tech support to resolve the issue. Thank you again and I hope you post more computer related info that is easy to follow. YOU ARE AN ANGEL!
Thank you very much for the tip. It worked for me, I was trying to install a voip program on windows7 and it gave me the same annoying error of another installation is taking place.
Guys follow the steps and it works.
I don’t know who you are, but I just want to tell you that you are a life saver!!
Great tip – Thanks very much 🙂
You are a genius and an angel. Thank you so much, and God bless you, too!
I love that for 2 years across multiple operating systems this “Feature” has been annoying many users! Thank you for the help! I too had dealt with and searched for too long. I did have an install that was kicking off at startup so I had to quickly cancel it after disabling the installer. Once I turned it back to manual, I could kick it off no problem.
Thanks again
Worked like a charm, Thanks a mill!
THANK YOU! IT WORKED!
IT worked for me…Thank you
Worked perfectly.
Thanx
Thanks, your solution worked perfectly.
this solution is great but it’s only till the NEXT time. It’s too bad there is not a DOS batch file to do this each and every time to do the same thing.
I came across your site & was quite impressed. My problem is “this program is not associated to perform this action, create a association in folder options” I’m sorta a newbie. Can you help me? dw
Instead, just stop the windows installer service and then start the installer. It worked for me with Hamachi.
SWEETNESS!! IT WORKED 😀 I had been looking around and everyone was saying crap about needed cleanup software. 10 minuets and done. Awesome!
Totally worked with a server that was kicking my butt. Thanks!!
Any help on a 32-bit Vista system where I’m getting the same message?
“This installation failed to start because another update installation is in progress”!
It actually even simpler and requires no restart. do as described above but instead, the program the you want to install that you get this message on keep running. then diable the installer, click ok, go back, hit retry and it should work, then when finished, click enable. DONE!
So I did all this and itunes will still is like Installation Already in Progress so idk if i missed anything or if there is somthing bigger here =/ any help
Well for crying out loud, it worked! Just as you said, Sheryl. Silly me cause I was skeptical. My problem was a do-over of a failed install of Exchange 2010 tools on a Win 7 platform. Ok, now I owe ya!! -S
OMG! THIS WORKED!!!
If I didn’t have any self-control I would have phased through cyber world to your screen then kissed you, smack on the lips!!! Even though I’m not a lesbian and lack that ability,
This was a life-saver!
Worked perfectly!! Thank you for posting so that those of us that are not Tier 1 IT tech support can resolve issues like these without having to wait for days for a call-back!!
Thank you!!
You have saved me so much time so many thanks to you. Well time has not been saved but at least I do not have to escalate this issue to my boss.
And youi have increased my knowledge base!!!
You, Sheryl, are my HERO!!
This worked perfectly! Thank you so much. 🙂
It worked! Thank you!
Thanks so much for the advice! I was thoroughly frustrated with trying to install a few new programs on my laptop. I kept getting the error message that another program was being installed and I knew that wasn’t true. I tried everything I could think of to fix the problem with no resolution. I had given up completely and was going to return the programs, until I searched Google one more time and found this site. I tried what you suggested and kept my fingers crossed. It corrected my problem on the first try and my programs installed successfully!! This very simply solved a problem that I have been struggling with continuously for a couple of weeks.
Thanks, it worked!
The problem program in question was Seagate’s SeaTools hard drive analyzer.
Tried what you suggested but trying to install Skype and I keep getting error 1618 even after. Rebooted after switching to Disable and then again after changing to Manual and double checked that it was still in Manual but no luck installing. This is not a new problem as I have not been able to install any new software for quite awhile. Any thoughts?
Let me be the first of 2012: it worked! Thank you kindly.
THANK YOUUUUUUU!!! :):):)
Thank you sheryl 🙂 ,
I was so lucky to come across this first before I found anything telling me to do something that will would have resulted in me making the situation worse.
Hi Cheryl
I have tried your example so many times to no avail to date, (I did send you a message yesterday, but have only just realised that your are USA based)….., My biggest concern has been how to open word documents that are attached to incoming mail for work purposes, and I have found a “work around”, although I still cannot open existing /saved word docs, seemingly due to “a programme still installing” (BUT DON’T KNOW WHAT/WHERE !!),
For emailed attached word docs I have discovered that if I click view, (not download)
>>edit on line
>>file>>
download as, (selecting pdf),
Then I can safely save to my docs and view at leisure, and re-attach and mail forward when required….rather laborious YES, but will keep me working for the now, but am still (after 3-days now)as perplexed as before, but thought this may help anyone in my situation for the time being, but ultimatley it doesn’t solve my problem with existing word docs
Work for me . I had to say thank you so much
Just wanted to say thanks for the post – I didn’t use your method, but it pointed me in the right direction, I ended up using an elevated task manager to kill msiexec.exe and it fixed it without rebooting.
Thanks very much! Worked like a charm. Wish I’d found your blog 1 week ago! But “never too late”!!
Hi Cheryl
I have tried your example so many times and i still get the same message… I was trying to sync my ipod to my iTunes and in the process iTunes asked me if I wanted to download the new version. I said yes, and guess what.. I lost my entire iTunes.. it doesnt even show up in my programs anymore. Then when I try downloading all the free versions of iTunes it keeps telling me that another ilnstallation is in progress. I kept trying your example and never could get it to work. I also now keep getting these messages when I reboot:
Error in C/Windows/System32/spool/DRIVERS/W32X86/3/DLCCTIME.dll
Missing Entry: RunDLL Entry
also:
Application has failed to start because
ASL.dll was not found
Re-Installing the application may fix problem..
I feel like I may have a virus on my computer.. I cannot even download the extra version of KASPERSKY that I paid for???? If you can help me I will be EVER SO GRATEFUL!!!! I have been working on this off and on now for three weeks.
I am excited that you have a website for everyones problems…. dont you get tired of answering everyones problems.. Ha Ha??? I will just wait to hear back from you.. thank you so much in advance….
Leslie
Leslie,
I googled “asl.dll missing”. I don’t know why I bothered to do this – just curious. I got about a zillion results referring to how an upgrade of iTunes generates this error if you try to jailbreak your iPhone with Blackra1n. Perhaps that’s what’s going on?
http://techie-buzz.com/how-to/how-to-fix-missing-asl-dll-while-running-blackra1n.html
My suggestion to you is that you google your other errors and address those. “Installation already in progress” is not your biggest problem. Check out those reboot errors.
– Sheryl
Finally, something that worked. Many thanks.
It’s funny how in 2012 this can still be a problem with Windows 7. It appears as if an installer I ran earlier got suspended mid-install. Even though I restarted several times I could not run further installations. This saved my day. Thank you so much!
I tried this and it worked! I have spent over a week looking for an “Easy” solution on the Zone Alarm threads as I knew it would be pointless Uninstalling and Reinstalling programmes, etc. You are a godsend!
Best wishes
Chris
Did not work for me. I did everything you said. After that I still couldn’t uninstall the stupid programs that come with itunes which means my itunes installation won’t work. Why does this have to happen -.-‘
3 1/2 years later and am glad I stumbled across this post. Thanks so much for such a simple fix!
Thankyou!
I found on Win 7 you can do this without the reboot!
Thankyou!
This works without the reboot! (win 7)
OH MY GOSH!!!!!!! Thank you…Thank you….Did I say Thank you!!!! I have not been able to get anything to download or update for weeks. Spent 1hr. 1/2 on phone with a tech support and after the 1hr. 1/2 they just gave up. You are a true computer lifesaver cause I was ready to start throwing things at it. 🙂
Thank you for posting! This just made my life a lot easier. I was able to click Disable, then the Stop button became active so I was able to stop and restart the service without rebooting. I’m using XP. Thanks again, great stuff!
Thanks for the Help . It worked like a charm and resolved the issue instantly .. thanks 🙂
THANK YOU !!!!!!!!!!!!!!!!!!