[jmedoc]

Hi all,

My Laptop won't let me Uninstall or Install programs... It is really annoying me.

When I try to uninstall a program, this message appears ...

Error 1721. There is a problem with this Windows Installer package.
A program required for this install to complete could not be run.



Please help... If you need any more information just mail me.

I am using Vista

...

J

[zackthewack]

I'm going to reply here. I don't know if you wanted help mailed to you or not. Lol.

The problem is probably that the Microsoft Installation Engine is corrupted. If any programs were downloaded with this, you want be able to Uninstall them. So here is how to fix this.

1. Start your computer in Safe mode. To do this, follow these steps:
   1. Restart the computer.
   2. After the BIOS information is displayed, press F8.
   3. Use the DOWN ARROW key to select Safe Mode, and then press ENTER.
   4. Use the UP ARROW key and the DOWN ARROW key to select your computer, and then press ENTER.
2. Log on to the computer as local administrator.
3. Click Start, click Run, type cmd.exe, and then click OK.
4. At the command prompt, type msiexec /unregister , and then press ENTER.
5. At the command prompt, type msiexec /regserver, and then press ENTER.
6. At the command prompt, type exit, and then press ENTER to close the command prompt.
7. Remove the software program from Add or Remove Programs.

If this does not work there is one more option you can do. Try this if the above does not work:

What you are going to run now is the "System File Checker". This checks all system operating files to make sure they are the right version and are working right. If they are not working right, it will put a file onto your system that is the right one.

1. Click Start, click Run, type cmd.exe, and then click OK.
2. At the command prompt, type sfc /purgecache, and then press ENTER.
   
   Note You may be prompted to provide Windows installation source files when you run the sfc /purgecache command. If the command is completed successfully, you will receive the following message:Windows File Protection successfully made the requested change.
3. At the command prompt, type sfc /scannow, and then press ENTER.
   
   Note This command may take several minutes to finish. You may also be prompted to provide Windows installation source files when you run the sfc /scannow command.
4. At the command prompt, type exit, and then press ENTER to close the command prompt.
5. Remove the software program from Add or Remove Programs.

Hope this is what you are looking for

[jmedoc]

Hi,

Thanks for the instructions...

What is a BIOS ??

No screen comes up when i restart my laptop it just goes staight to the user page/ login (or whatever it is called)

And i tryed the second option and when i type in *sfc /purgecache* it says "You must be an administrator running a consle session in order to use the sfc utillity" ... what does this meen ??

...

Thanks J

[joeten]

hi the bios is the basic input output system which starts the procedure for loading your system,hardware etc you may be able to access it by pressing f2 or delete on booting your comp then follow the previous post also note you may need to look up your model comp on the manufacturers support website for the exact key or combo to get to the bios

[jmedoc]

Hi,

I tried zackthewacks instructions ...

I got in safe mode, done everything you said, but when i opened control pannel and tried to uninstall - this message came up

"The Windows Installer Service could not be accessed. This can occur if the windows installer is not correctly installed, Contact your support personal for assistance"

What should i do now ?!?

...

J

[joeten]

hi you could try this http://www.vistax64.com/vista-instal...-versions.html you may need to scroll down a little

[rka0]

Hello jmedoc. You could try this.
http://ccollomb.free.fr/unlocker/