"Windows couldn't remove your computer from the homegroup."

This was one of the most informative posts on this Homegroup problem so I'm reporting that after 12+ hours effort I am finally SUCCESSFUL at resolving it.

That was the good news.  The actual details that tipped it into working mode are however a little sketchy as I was trying so many things.

My best guess as to what was the ultimate factor is either one or a combination of:

1. Changing HomeGroup Provider to "Local Service"  Homegroup Listener stay as 'local system account' (I'd previously fiddled with a number of these following another post)
2. Changing the name of the Computer even though there was no apparent name conflict on my network
3. Removing old version of Java (probably coincidental)
4. Turning off and on Microsoft Security Essentials
5. Removing the fixed IP address my Desktop was using

Some other comments after my multiple failed attempts.

1. Installing a WIFI card on my Desktop probably helped but didn't immediately resolve Homegroup issues when it was initially installed
2. Attempting to use Homegroup to Share my "Drives" library was maybe one of the things that stuffed things up.  When attempting to do this resulted in errors saying that root of drives can't be shared.
3. Changing the Log On account for the various services was probably not a smart thing to do.  I ended up in a rabbit hole of incompatible logon error messages
4. Resetting the router to a basic environment didn't immediately resolve anything but may have helped the network troubleshooter fix things automatically

Good luck if you're still seeking resolutions though.

Unfortunately NONE of these have worked for me - tried just about everything including a system restore which failed so now I'm stumped.  Any other ideas?

I have wasted a many hours and days searching for solutions to this problem. I have not been able to find a solution to this problem. Everything I have ever come across I have done and still no luck. On my mom's laptop the homegroup works perfectly but on mine it doesn't. I'm stumped and have just about had it. I'll go back to the old way of using a flash drive to transfer data from one laptop to the other. It is freaking ridiculous that I have to do that.

Sorry for replaying to a year old post but I really wanted to tank you. Worked like a bloody charm.

I found that to fix this problem on my PC I had to delete the file:

C:\Windows\ServiceProfiles\LocalService\AppData\Roaming\PeerNetworking\idstore.sst and the new version of that file too.

Then I followed the steps from this post:

Hi Mark,

First lets disable the services “HomeGroup Listener” and “HomeGroup Provider” and then try to leave the homegroup from both the computers.

To remove Homegroup (and stop Homegroup networking functionality):

1.    Go toControl Panel -> Network and Sharing Center ->HomeGroup, and click onLeave the homegroup link to unjoin from any existing home group.

Note: If the home group are shared and hosted from the PC, all HomeGroup connections will be disconnected.

2.    Click on Leave the homegroup and confirm.  In the future, if you want to use Homegroup networking you can create a homegroup using this same dialog.

3.    Go to Control Panel -> System and Security ->Administrative Tools, and double click on **Services.**Alternatively, type services.msc in Start Search.

4.    For each of the following two services:

HomeGroup ListenerHomeGroup Provider

Do the following:

Stop the service, and then double click on the service to open Properties dialog, and set its Startup type to Disabled. Click OK when done. 

I then tried to leave the homegroup with no success, so I went back and set the Startup type back to Manual and re-started the two services.

After that I tried to leave the homegroup and succeeded. No restarts or anything throughout the process.