Windows 7 KB4088875 and KB4099950

As part of the March 13, patch-Tuesday package, Windows Update installed KB4088875 on my W7 systems (all physical VMs):

Apparently, it is flawed, because MS issued KB4099950 on Thursday, April 5, an out-of-band patch to fix issues caused by KB4088875:

Problem is, KB4099950 has this note (copied here under "Fair Use"):
Important This update must be installed before you install KB4088875 or KB4088878.
Of course, KB4088875 (or KB4088878) has already been installed. So, two questions:

(1) Should KB4088875 be uninstalled before installing KB4099950?

(2) If the answer to (1) is yes, should KB4088875 be reinstalled after installing KB4099950?

I've done a fair amount of web searching on this (found info such as the AskWoody thread), but I'm mostly interested in EE members who have actually addressed this issue on their W7 systems. I found this EE thread on KB4088875:

But that was closed before KB4099950 was released, and a search at EE for KB4099950 comes up empty.

Thanks much, Joe
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Joe Winograd, Fellow&MVEDeveloperAsked:
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JohnBusiness Consultant (Owner)Commented:
Hello Joe,

I am watching this thread.  As note in the post you referred to, KB4088875 was installed on my Windows 7 VM as a monthly rollup on March 13 and it did not cause issues.

It has not been superseded by either of the other updates you mention above.

However KB4088881was a recommended (not critical) update that I installed on March 28.

KB4088881 remains as an installed update, but KB4088875 is no longer an installed update.

So then I think it may be fair to conclude (as I have in past on any Windows 7, or 10 OS, that Microsoft will update newer patches and will dispense with older patches automatically.  Why?  Most people will just run updates and so Microsoft must accomodate most people.

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Joe Winograd, Fellow&MVEDeveloperAuthor Commented:
Hi John,

> KB4088875 was installed on my Windows 7 VM as a monthly rollup on March 13
> KB4088875 is no longer an installed update

That's very interesting! I wonder if KB4088881 uninstalled KB4088875. Have you installed KB4099950? Thanks, Joe
JohnBusiness Consultant (Owner)Commented:
I ran Windows 7 Updates today (all critical / recommended) and KB4099950 does not show up in Installation History or Installed Updates.

I think that is because machines differ and so Windows updates differ as well.
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Joe Winograd, Fellow&MVEDeveloperAuthor Commented:
Thanks, John, good to know.
Joe Winograd, Fellow&MVEDeveloperAuthor Commented:
With no comments here besides John's, I decided to uninstall KB4088875 and then install KB4099950. The uninstall of KB4088875 worked fine, although it required a restart. However, after telling Windows Update to install KB4099950, which seemed to be successful, a search of installed updates shows that it was not installed. Instead, KB4091290 was installed, which wasn't even in the list of updates to install. Very strange stuff!

I'll leave this open for another day or two to allow anyone else with experiences on these updates to share them, then I'll close it. Regards, Joe
JohnBusiness Consultant (Owner)Commented:
See what tomorrow brings (April Patch Tuesday). Windows 7 shares in this and will update your system.
Joe Winograd, Fellow&MVEDeveloperAuthor Commented:
Hi John,
I never install updates on Patch Tuesday. I keep an eye on the news reports to see what problems there are in the updates and wait for things to settle down. Lately, there have been so many problems with updates that some pundits recommend turning off Windows Update, at least temporarily. I don't need to do that because, as I said, I never install on Patch Tuesday, anyway.

It seems that no one else is going to jump into this question, so I'll close it. At this time, on my W7 Pro system, I have no KB408xxxx updates and the only KB409xxxx update is KB4091290 — and all is well.

Thanks for your help, John. Regards, Joe
Joe Winograd, Fellow&MVEDeveloperAuthor Commented:
Uninstalling KB4088875 and then telling Windows Update to install KB4099950 seems to have worked fine, although it did not install KB4099950. But it did install KB4091290. Go figure. :)  Regards, Joe
JohnBusiness Consultant (Owner)Commented:
Thank you for the update.  I ran Windows 7 Updates yesterday. Nothing major and no big changes.
Joe Winograd, Fellow&MVEDeveloperAuthor Commented:
You're welcome, John, and thanks back to you for letting me know that you had no problems with the W7 updates from yesterday's Patch Tuesday package. Regards, Joe
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