Windows 7 Forums

Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: Cannot access Windows Installer - can't reinstall

26 Jan 2014   #11
andrew129260

Windows 10 Pro
 
 

Yes in the dos cmd window. Right click cmd in the search results and choose run as admin.

If this fails we can always do a repair install.

Repair Install

That way you wont lose programs or data.


My System SpecsSystem Spec
.
26 Jan 2014   #12
ehwj

Win7 Home Premium 64-bit SP 1
 
 

Alas no change.
Ran as instructed with one difference. When double clicked on Windows_Installer.reg, I did not see the option to merge. Did I do something wrong?
My System SpecsSystem Spec
26 Jan 2014   #13
andrew129260

Windows 10 Pro
 
 

Quote   Quote: Originally Posted by ehwj View Post
Alas no change.
Ran as instructed with one difference. When double clicked on Windows_Installer.reg, I did not see the option to merge. Did I do something wrong?
Did you get a popup after clicking it stating are you sure you want to continue?

Then if you clicked yes and then ok your fine. Sorry wrong wording
.

Go ahead and restart.

Now download something like firefox or a program with an installer and see if it works.
My System SpecsSystem Spec
.

26 Jan 2014   #14
ehwj

Win7 Home Premium 64-bit SP 1
 
 

Quote   Quote: Originally Posted by andrew129260 View Post
Quote   Quote: Originally Posted by ehwj View Post
Alas no change.
Ran as instructed with one difference. When double clicked on Windows_Installer.reg, I did not see the option to merge. Did I do something wrong?
Did you get a popup after clicking it stating are you sure you want to continue?

Then if you clicked yes and then ok your fine. Sorry wrong wording.

Go ahead and restart.
No change. I attempted a repair and error said "Windows Installer Service cannot be accessed"
My System SpecsSystem Spec
26 Jan 2014   #15
andrew129260

Windows 10 Pro
 
 

Quote   Quote: Originally Posted by ehwj View Post

No change. I attempted a repair and error said "Windows Installer Service cannot be accessed"
Darn it.

So you still cannot access your software? You cannot uninstall any programs still? Can you install any programs?

Does the pc have a disk drive? We can download the official links for windows 7 and get you a burned cd with a legit windows 7.

Then we can look into a repair install.

If you have that hidden recovery partition though you should be able to reinstall windows without a disk. Problem is you would lose everything and would have to reinstall all your programs.

Do you have your data backed up?
My System SpecsSystem Spec
26 Jan 2014   #16
Slartybart

x64 (6.3.9600) Win8.1 Pro & soon dual boot x64 (6.1.7601) Win7_SP1 HomePrem
 
 

Quote   Quote: Originally Posted by ehwj View Post
Alas no change.
Ran as instructed with one difference. When double clicked on Windows_Installer.reg, I did not see the option to merge. Did I do something wrong?
Right click > merge, not double click

Sorry, double click is fine if you got the popup.

I'll go take a long walk
My System SpecsSystem Spec
26 Jan 2014   #17
derekimo

Microsoft Community Contributor Award Recipient

 
 

Quote   Quote: Originally Posted by ehwj View Post
Alas no change.
Ran as instructed with one difference. When double clicked on Windows_Installer.reg, I did not see the option to merge. Did I do something wrong?
Did you notice this in the yellow tip box under step 3?

Services - Restore Default Services in Windows 7

Quote:
If you do not see a Merge option when you right click on the REG file, then you will need to check in Default Programs to set the reg file extension to have it's Current Default program set as Registry Editor (C:\Windows\regedit.exe). Afterwards, try merging the REG file again.
My System SpecsSystem Spec
26 Jan 2014   #18
ehwj

Win7 Home Premium 64-bit SP 1
 
 

Quote   Quote: Originally Posted by andrew129260 View Post
Quote   Quote: Originally Posted by ehwj View Post

No change. I attempted a repair and error said "Windows Installer Service cannot be accessed"
Darn it.

So you still cannot access your software? You cannot uninstall any programs still? Can you install any programs?

Does the pc have a disk drive? We can download the official links for windows 7 and get you a burned cd with a legit windows 7.

Then we can look into a repair install.

If you have that hidden recovery partition though you should be able to reinstall windows without a disk. Problem is you would lose everything and would have to reinstall all your programs.

Do you have your data backed up?
Cannot install or uninstall.
Yes, PC has one internal drive and two external drives.
Internal Drive is 1.5 TB, 3 Partitions - C:\Win7 and Program files; D:\ and E:\ with data
External Drives 1.0 and 1.5TB with back up stuff, unfortunately I just discovered that the automatic backups have failed for some time so don't have a recent backup.
I also have a hidden recovery partition but do not want to reinstall until all else fails.
My System SpecsSystem Spec
26 Jan 2014   #19
Slartybart

x64 (6.3.9600) Win8.1 Pro & soon dual boot x64 (6.1.7601) Win7_SP1 HomePrem
 
 

I guess it wasn't that long of a walk.

First thing then is to copy your data to the external drive.

edit: combined posts

Could you post a Disk Mangement screen shot?
http://www.sevenforums.com/tutorials/274797-disk-management-post-screen-capture-image.html
My System SpecsSystem Spec
26 Jan 2014   #20
Slartybart

x64 (6.3.9600) Win8.1 Pro & soon dual boot x64 (6.1.7601) Win7_SP1 HomePrem
 
 

Sorry about that ehwj. I'm trying not to fire too many things at you.

More information though would be very helpful. Thanks for post 18.


Here are some tutorials you can read. If you have any queestions about either, I'll try to answer tehm. Wehn you're comfortable with the processes a member can help you through the tutorial if you need assistance.

Just read them for now.
Eventually you'll need something to try and recover your system, start here:
System Repair Disc - Create
- hopefully you have a blank CD-R (a Repair disk doesn't need a DVD, it's relatively small)

I'd also like to see if you can roll back your system at some point using System Protection - Restore Points.
System Restore - OPTION ONE (pay close attention to step 7)

I sure you have enough for now. I'll let you chew on what I gave you.

Let me know when you're data is safely backed up / copied.

Bill
-
My System SpecsSystem Spec
Reply

 Cannot access Windows Installer - can't reinstall




Thread Tools Search this Thread
Search this Thread:

Advanced Search




Similar help and support threads
Thread Forum
Only trusted installer access - change
I have corrupted files involving volume control They show 0 bytes but have files which show if I use properties review . I have a copies from another computer but when I try anything associated with the empty file location on the troubled machine I get stuck because only trusted installer can...
Performance & Maintenance
Unable to access BIOS aften failed reinstall of Windows.
Hi. I am trying to reinstall Windows on my Gf laptop; an Acer Aspire V5-531, model MS2361. At selektiv which HDD to install Windows onto that harddrive since it was GPT partisjon, I try a tid from the internet: diskpart List disk Select disk Clean Exit I then reformated the HDD This trick...
Installation & Setup
Windows Installer Error, Access Denied
Error after trying to install something: "The Windows Installer service could not be accessed. This can occur if the windows Installer is not correctly installed. Contact your support personnel for assistance." I can't even install ALL of my windows updates: Error 641 from windows updater. ...
Software
No access to the Windows Installer Service!! (please help me asap...)
Hey THIS is one of those excrutiatingly annoying problems that I've been trying to solve for the past 2 weeks through Google, Windows Help and God knows what else ... but nothing. :mad: I seriously hope anyone out there can help me ... it'd be much, much appreciated. :D I have a problem...
Installation & Setup
Can't access files after reinstall windows 7
Dear All, I need some help here. Recently I have reinstall my Windows 7 (Professional) for some reasons. I use the same version for the new install. But when I try to open my files, some programs said that they can't create folder in the target location (iPod Video Converter), some said that...
Installation & Setup
D Drive is Access Denied after Windows 7 Reinstall
Greetings, I previously had a post under "Network and Sharing http://www.sevenforums.com/network-sharing/26705-no-networks-connect-very-weired.html" that I resolved by reinstalling Windows 7. My computer has one hard disk that I partitioned to C: and D:, C: has the operating system and D: has...
Hardware & Devices


Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 19:58.

Twitter Facebook Google+



Windows 7 Forums

Seven Forums Android App Seven Forums IOS App