When you try to install a program which uses the built in Windows Installer service, it gives the following error:

The Windows Installer Service could not be accessed.
This can occur if you are running Windows in safe
mode, or if the Windows Installer is not correctly
installed. Contact your support personnel for assistance.

windows installer error

This issue may occur in Windows XP or in Windows Vista. The reason behind this error is that sometimes the Windows Installer service gets corrupt due to registry corruptions etc. or simple enough the Windows Installer service is not running at all. There are two fixes that I have found useful for this problem.

Through Run Command:

This is the Microsoft solution which comes in handy because of its ease of use:

  • Log on to your computer as an administrator.
  • Click Start, and then click Run.
  • In the Open box, type cmd, and then click OK.
  • At the command prompt, type msiexec.exe /unregister, and then press ENTER.
  • Type msiexec /regserver, and then press ENTER.

Through Registry:

This is also a simple trick. Just download the following registry file and double click it. It will ask if you want the information to be added to the registry, just press yes. Now you should be able to install your programs without any problems. If still there’s a problem, restart your system once.

registry add windows installer service

Restore Windows Installer Service (7.0 KiB, 22,905 hits)


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44 Comments to “Solution: The Windows Installer Service Could Not Be Accessed Error In Windows”

  1. geeek says:

    Guys, you are wonderful. The reg file helped after several ours of waste! thank you! saved my day.
    Drugelis

  2. julia n says:

    didn’t work. nothing works. did every single thing that i found on the net and nothing did the trick! still cannot install! HELP PLEASE!

  3. qhung says:

    Your little me are the problem in this, is Search menu to appear, the Search button on the Standard still available, but when you click on it only up to each dog’s (Animate character): cry: Yes not appear to be items you can enter information Search?
    I have not encountered this case never should also not know the history how to find it in group policy but not out, so they only know me with giùm nhé, thanks a lot everyone!

  4. fakhar zaman says:

    Guys, you are wonderful. The reg file helped after several ours of waste! thank you! saved my day.

  5. Christine says:

    I wish it had worked, but it didn’t.

  6. Tracey acermininotebook.wordpress.com says:

    Beautiful. Command line commands worked excellently and took 10 seconds. Thanks!!!!!!!!

  7. Conductor says:

    Thanks a lot!!! It works!!!

  8. absolutely brilliant,simple ,easy and effeiciant.kudos

  9. Suresh Thota says:

    Thanks alot , its working fine.

  10. daria kurdmax.com says:

    wheres the download link ?pls help

  11. Leandro says:

    Hi Sanix,

    Thanks a lot!!!

    It worked!!!

  12. daria says:

    plssss help … there is no download link , where is it? plsssssss

  13. daria says:

    this is wrighted ([download id="137"])

  14. Sanix technize.com says:

    daria, thank you for pointing out. Now all the download links are working. Kindly check again and download the tool you want.

  15. daria kurdmax.com says:

    thanx very much , you guys really helped me out , thank youuuuuuuuu again

  16. Tangerine says:

    The download is an mp3 file…so it didn’t work.

  17. Tom technize.com says:

    Outstanding! Command line commands worked perfectly! Took only seconds! Thanks!!

  18. daria kurdmax says:

    hey tangerine , change the extension of the file , delete (mp3) extension to (reg) . then try it again

  19. Nischal Jain says:

    Thanks a lot. Registry file solved my problem.

  20. Rumki Sarkar says:

    Thankssssssssssss a lot.

  21. blakeo says:

    simple and effective, thanks

  22. Nigel says:

    The registry file worked for me. Thanks a lot!

  23. peter says:

    Thank you very much! can sleep now!

  24. zoranze mast.com says:

    kool man! thanks a lor! it works great!!!!!!!!!
    that’s the best solution!!!!!!!!!!!!!

  25. danni ie says:

    my pc will not let me download anything i an in IE

  26. Rick says:

    well, i tried everything on microsoft’s web site (several different pages in support dedicated to the issue, but all offering different solutions) and did the two hacks suggested in this forum, but nothing has worked. if anybody has a sure fire solution, i would love to know. interestingly, when doing one of the microsoft remedies, a dialogue box popped up saying that i did not need to do it, as the files were fine and up to date. whatever . . . i would be interested in any other solutions, though, as i am doing a rebuild and have a ton of software to install . . . never had this problem before . . . and i have done about 30 builds from scratch!

  27. sean says:

    I get garbled text on the link. ???

  28. Sanix technize.com says:

    @sean
    The download link is working perfectly. Can you kindly use a different browser for the download?If it still doesn’t work, please let me know.

  29. RelliK1000 says:

    Thanks

    # At the command prompt, type msiexec.exe /unregister, and then press ENTER.
    # Type msiexec /regserver, and then press ENTER.

    Works everytime
    BUT why does it seem I have to do it everytime I try to install .msi progs?

  30. unRheal locohost says:

    While this didn’t work for me, glad it workd for some… There’s a couple of minor issues with it, that probably don’t adversely affect the system running properly, just UI stuff. (I think)

    It downloaded via Firefox v3.5.6 as an HTM file (Restore Windows Installer Service.htm) – plus it was unicode, not sure if that affects anyone. I renamed it to .REG (of course) and double-clicked it to load it to my Registry.. (*after* loading Regedit and going to HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServices and exporting the MSIServer key for backup! – People should do this anyway, just in case!)

    I noticed off the bat that you put:
    “Description”=”@%SystemRoot%\system32\msimsg.dll,-32″
    Which isn’t right, since it’s supposed to be:
    “Description”=”Adds, modifies, and removes applications provided…” etc. etc..
    AKA: It’s supposed to be the text description of the service! So maybe some other variable that *should* be “@%SystemRoot%\…” etc… is not getting set so(?)

    Similarly:
    “DisplayName”=”@%SystemRoot%\system32\msimsg.dll,-27″
    Is not right either, as it’s for Humans to read (just like Description is) – it should be:
    “DisplayName”=”Windows Installer”
    So again I wonder if that string should be getting assigned to some other variable that it’s not getting assigned to…(?)

    That’s all – thanks anyway, I guess I’ll keep looking for what’s up with my system. I’m going to try to find a place to (re)install the stuff – maybe that’ll help(?) Cheers

  31. Kat says:

    Thanks so much guys. This worked for me.
    Log on to your computer as an administrator.
    Click Start, and then click Run.
    In the Open box, type cmd, and then click OK.
    At the command prompt, type msiexec.exe /unregister, and then press ENTER.
    Type msiexec /regserver, and then press ENTER.

    This little trick worked well! Thank you soo much. Saved me from
    having to buy a scanner and/or taking it to be fixed.

  32. Candy says:

    Bullcrap. Link takes me to regcure – not a reg file.

  33. Mikami15 says:

    It works.
    I just downloaded it.

    to Candy: open the link in new tab & copy the url to Internet Download Manager(Add download)..wait till the .reg file size is shown & click download.

  34. Lo says:

    Hey Mikami, it doesn’t work for me… how do i download the registry file? when i click on it i’m being diverted to http://quad-cleaner.com/v3/?PI.....f2fbd9d2e7
    Can you pls let me know the step by step to download it?

    Thanks

  35. Sanix technize.com says:

    Lo, you can use any other web browser other than Firefox ( preferably IE) to download this file. Firefox doesn’t seem to associate the file with a program correctly.

  36. TriniKid says:

    Thanks alot guys, this really helped !!

  37. Alvi says:

    wait, whats supposed to happen after you type:
    Type msiexec /regserver, and then press ENTER.

    nothing happened for me. PLEASE HELP

  38. [...] did what was suggested on this page? Yes, but i do another thing together with the cmd trick. HERE there is a reg file at the end of the article "Restore Windows Installer Service" 7 kb. [...]

  39. Bao Nguyen tinhoctrevietnam.com says:

    very usefull. Thank so much

  40. Bao Nguyen tinhoctrevietnam.com says:

    Thank so much. Very useful

  41. Bao Nguyen tinhoctrevietnam.com says:

    Thank so much. Welcome to my Website. Link to Tin Hoc tre Viet Nam

  42. Bebede eatmynames.wordpress.com says:

    Thanks a lot, this FIX MY PROBLEM AT ALL ….

  43. Denis says:

    Guys thank you so much!I will recommend you to all of my friends,ty 1 billion times!

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