2.7.14 does not uninstall cleanly if installation was run as SYSTEM account (SCCM)

[77c13797-ea36-4124-a716-b91bbc59a2b9]

BPO	32049
Nosy	@pfmoore, @tjguk, @zware, @zooba, @niemalsnever

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields: ```python assignee = None closed_at = created_at = labels = ['type-bug', 'expert-installation', 'OS-windows'] title = '2.7.14 does not uninstall cleanly if installation was run as SYSTEM account (SCCM)' updated_at = user = 'https://github.com/niemalsnever' ``` bugs.python.org fields: ```python activity = actor = 'zach.ware' assignee = 'none' closed = True closed_date = closer = 'zach.ware' components = ['Installation', 'Windows'] creation = creator = 'niemalsnever' dependencies = [] files = [] hgrepos = [] issue_num = 32049 keywords = [] message_count = 2.0 messages = ['306359', '367295'] nosy_count = 5.0 nosy_names = ['paul.moore', 'tim.golden', 'zach.ware', 'steve.dower', 'niemalsnever'] pr_nums = [] priority = 'normal' resolution = 'out of date' stage = 'resolved' status = 'closed' superseder = None type = 'behavior' url = 'https://bugs.python.org/issue32049' versions = ['Python 2.7'] ```

[77c13797-ea36-4124-a716-b91bbc59a2b9]

If I install Python 2.7.14 on Windows (using the MSI) using the SYSTEM account, as is done by SCCM, uninstalling fails to clean up the registry so Python is still showing up as installed in the control panel (and still detected by SCCM).

SCCM runs the following command line to install Python: msiexec /i "python-2.7.14.amd64.msi" ADDLOCAL=ALL /qn

For uninstallation I use the following command line: msiexec /x {0398A685-FD8D-46B3-9816-C47319B0CF5F}

Both are run as the SYSTEM account.

[zware]

Hi Sven,

I'm sorry this issue never got attention before the end of 2.7, but as we have now reached that point I'm going to go ahead and close this issue. I hope it didn't cause you too much trouble! If you can also reproduce this with a current version of Python 3, please either reopen this issue or open a new one.