Hi,
This issue can be caused by the incorrect credential on Windows 7.
Try to add correct credential on Credential Manager:
1 Click Start
2 Input Credential Manager in search box and press Enter
3 In credential manager, add a generic credential, input the https site, username and password.
Also try to temporary disable UAC for test.
Regards,
Leo
HuangLeo Huang
TechNet Community Support
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